Source/WebCore: https://bugs.webkit.org/show_bug.cgi?id=81685

[New Multicolumn] Add RenderMultiColumnFlowThread to hold the flow thread contents of a multi-column block. It derives from RenderFlowThread. Refactor RenderFlowThread to split out the stuff related to explicit naming into a subclass, RenderNamedFlowThread. This allows RenderFlowThread to be a simple base class that involves maintaining the regions themselves. Reviewed by Julien Chaffraix. * CMakeLists.txt: * GNUmakefile.list.am: * Target.pri: * WebCore.gypi: * WebCore.vcproj/WebCore.vcproj: * WebCore.xcodeproj/project.pbxproj: * dom/Document.cpp: * dom/NodeRenderingContext.cpp: * dom/NodeRenderingContext.h: (WebCore): (WebCore::NodeRenderingContext::parentFlowRenderer): * dom/WebKitNamedFlow.cpp: (WebCore::WebKitNamedFlow::WebKitNamedFlow): * dom/WebKitNamedFlow.h: (WebCore): (WebCore::WebKitNamedFlow::create): (WebKitNamedFlow): * rendering/RenderBlock.cpp: (WebCore::RenderBlock::collapseAnonymousBoxChild): * rendering/RenderFlowThread.cpp: (WebCore::RenderFlowThread::RenderFlowThread): (WebCore): (WebCore::RenderFlowThread::addRegionToThread): (WebCore::RenderFlowThread::removeRegionFromThread): (WebCore::RenderFlowThread::removeRenderBoxRegionInfo): * rendering/RenderFlowThread.h: (WebCore): * rendering/RenderMultiColumnFlowThread.cpp: Added. (WebCore): (WebCore::RenderMultiColumnFlowThread::RenderMultiColumnFlowThread): (WebCore::RenderMultiColumnFlowThread::renderName): * rendering/RenderMultiColumnFlowThread.h: Added. (WebCore): (RenderMultiColumnFlowThread): * rendering/RenderNamedFlowThread.cpp: Added. (WebCore): (WebCore::RenderNamedFlowThread::RenderNamedFlowThread): (WebCore::RenderNamedFlowThread::renderName): (WebCore::RenderNamedFlowThread::nextRendererForNode): (WebCore::RenderNamedFlowThread::previousRendererForNode): (WebCore::RenderNamedFlowThread::addFlowChild): (WebCore::RenderNamedFlowThread::removeFlowChild): (WebCore::RenderNamedFlowThread::dependsOn): (WebCore::compareRenderRegions): (WebCore::RenderNamedFlowThread::addRegionToThread): (WebCore::RenderNamedFlowThread::removeRegionFromThread): (WebCore::RenderNamedFlowThread::checkInvalidRegions): (WebCore::RenderNamedFlowThread::addDependencyOnFlowThread): (WebCore::RenderNamedFlowThread::removeDependencyOnFlowThread): (WebCore::RenderNamedFlowThread::pushDependencies): (WebCore::RenderNamedFlowThread::ensureNamedFlow): * rendering/RenderNamedFlowThread.h: Added. (WebCore): (RenderNamedFlowThread): (WebCore::RenderNamedFlowThread::name): (WebCore::RenderNamedFlowThread::hasChildren): (WebCore::RenderNamedFlowThread::hasChild): (WebCore::RenderNamedFlowThread::isRenderNamedFlowThread): (WebCore::toRenderNamedFlowThread): * rendering/RenderObject.cpp: (WebCore::RenderObject::willBeDestroyed): * rendering/RenderObject.h: (WebCore::RenderObject::isRenderNamedFlowThread): * rendering/RenderObjectChildList.cpp: (WebCore::renderNamedFlowThreadContainer): (WebCore::RenderObjectChildList::removeChildNode): (WebCore::RenderObjectChildList::appendChildNode): (WebCore::RenderObjectChildList::insertChildNode): * rendering/RenderRegion.cpp: (WebCore::RenderRegion::RenderRegion): (WebCore::RenderRegion::attachRegion): * rendering/RenderRegion.h: (WebCore): (WebCore::RenderRegion::parentNamedFlowThread): (RenderRegion): * rendering/RenderTreeAsText.cpp: (WebCore::writeRenderNamedFlowThreads): (WebCore::writeLayers): * rendering/RenderView.cpp: (WebCore::RenderView::RenderView): (WebCore::RenderView::layout): (WebCore::RenderView::styleDidChange): (WebCore::RenderView::ensureRenderFlowThreadWithName): (WebCore::RenderView::layoutRenderNamedFlowThreads): * rendering/RenderView.h: (WebCore): (RenderView): (WebCore::RenderView::hasRenderNamedFlowThreads): (WebCore::RenderView::isRenderNamedFlowThreadOrderDirty): (WebCore::RenderView::setIsRenderNamedFlowThreadOrderDirty): (WebCore::RenderView::renderNamedFlowThreadList): LayoutTests: https://bugs.webkit.org/show_bug.cgi?id=81685 [New Multicolumn] Add RenderMultiColumnFlowThread to hold the flow thread contents of a multi-column block. It derives from RenderFlowThread. Change layout test results to reflect the name change from RenderFlowThread to RenderNamedFlowThread. Other platforms should update results accordingly. Reviewed by Julien Chaffraix. * fast/repaint/inline-relative-positioned-expected.txt: * fast/repaint/overflow-clip-subtree-layout-expected.txt: * fast/repaint/subtree-root-clip-2-expected.txt: * fast/repaint/subtree-root-clip-3-expected.txt: * fast/repaint/subtree-root-clip-expected.txt: * platform/mac/fast/regions/bottom-overflow-out-of-first-region-expected.txt: * platform/mac/fast/regions/flow-content-basic-expected.txt: * platform/mac/fast/regions/flow-content-basic-vertical-expected.txt: * platform/mac/fast/regions/flow-content-basic-vertical-rl-expected.txt: * platform/mac/fast/regions/multiple-directionality-changes-in-variable-width-regions-expected.txt: * platform/mac/fast/regions/overflow-in-uniform-regions-dynamic-expected.txt: * platform/mac/fast/regions/overflow-in-variable-width-regions-expected.txt: * platform/mac/fast/regions/overflow-moving-below-floats-in-variable-width-regions-expected.txt: * platform/mac/fast/regions/overflow-not-moving-below-floats-in-variable-width-regions-expected.txt: * platform/mac/fast/regions/overflow-rtl-in-variable-width-regions-expected.txt: * platform/mac/fast/regions/overflow-size-change-in-variable-width-regions-expected.txt: * platform/mac/fast/regions/overflow-size-change-with-stacking-context-expected.txt: * platform/mac/fast/regions/overflow-size-change-with-stacking-context-rtl-expected.txt: * platform/mac/fast/regions/percentage-margins-mixed-ltr-dominant-regions-expected.txt: * platform/mac/fast/regions/percentage-margins-mixed-rtl-dominant-regions-expected.txt: * platform/mac/fast/regions/percentage-margins-rtl-variable-width-regions-expected.txt: * platform/mac/fast/regions/percentage-margins-variable-width-regions-expected.txt: * platform/mac/fast/regions/region-overflow-auto-overflow-hidden-expected.txt: * platform/mac/fast/regions/region-overflow-auto-overflow-visible-expected.txt: * platform/mac/fast/regions/region-overflow-break-expected.txt: * platform/mac/fast/regions/region-style-block-background-color-expected.txt: * platform/mac/fast/regions/region-style-block-background-color2-expected.txt: * platform/mac/fast/regions/region-style-image-background-color-expected.txt: * platform/mac/fast/regions/region-style-inline-background-color-expected.txt: * platform/mac/fast/regions/render-region-custom-style-mark-expected.txt: * platform/mac/fast/regions/text-region-split-small-pagination-expected.txt: * platform/mac/fast/regions/top-overflow-out-of-second-region-expected.txt: * platform/mac/fast/regions/webkit-flow-double-pagination-float-push-expected.txt: * platform/mac/fast/regions/webkit-flow-float-pushed-to-last-region-expected.txt: * platform/mac/fast/regions/webkit-flow-float-unable-to-push-expected.txt: * platform/mac/fast/regions/webkit-flow-floats-inside-regions-bounds-expected.txt: * platform/mac/fast/regions/webkit-flow-inlines-inside-regions-bounds-expected.txt: * platform/mac/fast/regions/webkit-flow-inlines-inside-regions-bounds-vertical-expected.txt: * platform/mac/fast/regions/webkit-flow-inlines-inside-regions-bounds-vertical-rl-expected.txt: * platform/mac/fast/repaint/japanese-rl-selection-repaint-in-regions-expected.txt: * platform/mac/fast/repaint/line-flow-with-floats-in-regions-expected.txt: * platform/mac/fast/repaint/overflow-flipped-writing-mode-block-in-regions-expected.txt: * platform/mac/fast/repaint/region-painting-invalidation-expected.txt: * platform/mac/fast/repaint/region-painting-via-layout-expected.txt: * platform/qt/fast/repaint/line-flow-with-floats-in-regions-expected.txt: * platform/qt/fast/repaint/overflow-flipped-writing-mode-block-in-regions-expected.txt: * platform/qt/fast/repaint/region-painting-invalidation-expected.txt: * platform/qt/fast/repaint/region-painting-via-layout-expected.txt: * platform/win/fast/repaint/japanese-rl-selection-repaint-in-regions-expected.txt: Canonical link: https://commits.webkit.org/99866@main git-svn-id: https://svn.webkit.org/repository/webkit/trunk@112453 268f45cc-cd09-0410-ab3c-d52691b4dbfc
WebKit · Mar 28, 2012 · ab23b847c26242a7ad4df4edde111d62dc739cc4 · ab23b84
1 parent af2f11d
commit ab23b847c26242a7ad4df4edde111d62dc739cc4
Showing 75 changed files with 875 additions and 379 deletions.
diff --git a/LayoutTests/ChangeLog b/LayoutTests/ChangeLog
@@ -1,3 +1,65 @@
+2012-03-28  David Hyatt  <hyatt@apple.com>
+
+        https://bugs.webkit.org/show_bug.cgi?id=81685
+
+        [New Multicolumn] Add RenderMultiColumnFlowThread to hold the flow thread contents of a multi-column block.
+        It derives from RenderFlowThread.
+
+        Change layout test results to reflect the name change from RenderFlowThread to
+        RenderNamedFlowThread. Other platforms should update results accordingly.
+
+        Reviewed by Julien Chaffraix.
+
+        * fast/repaint/inline-relative-positioned-expected.txt:
+        * fast/repaint/overflow-clip-subtree-layout-expected.txt:
+        * fast/repaint/subtree-root-clip-2-expected.txt:
+        * fast/repaint/subtree-root-clip-3-expected.txt:
+        * fast/repaint/subtree-root-clip-expected.txt:
+        * platform/mac/fast/regions/bottom-overflow-out-of-first-region-expected.txt:
+        * platform/mac/fast/regions/flow-content-basic-expected.txt:
+        * platform/mac/fast/regions/flow-content-basic-vertical-expected.txt:
+        * platform/mac/fast/regions/flow-content-basic-vertical-rl-expected.txt:
+        * platform/mac/fast/regions/multiple-directionality-changes-in-variable-width-regions-expected.txt:
+        * platform/mac/fast/regions/overflow-in-uniform-regions-dynamic-expected.txt:
+        * platform/mac/fast/regions/overflow-in-variable-width-regions-expected.txt:
+        * platform/mac/fast/regions/overflow-moving-below-floats-in-variable-width-regions-expected.txt:
+        * platform/mac/fast/regions/overflow-not-moving-below-floats-in-variable-width-regions-expected.txt:
+        * platform/mac/fast/regions/overflow-rtl-in-variable-width-regions-expected.txt:
+        * platform/mac/fast/regions/overflow-size-change-in-variable-width-regions-expected.txt:
+        * platform/mac/fast/regions/overflow-size-change-with-stacking-context-expected.txt:
+        * platform/mac/fast/regions/overflow-size-change-with-stacking-context-rtl-expected.txt:
+        * platform/mac/fast/regions/percentage-margins-mixed-ltr-dominant-regions-expected.txt:
+        * platform/mac/fast/regions/percentage-margins-mixed-rtl-dominant-regions-expected.txt:
+        * platform/mac/fast/regions/percentage-margins-rtl-variable-width-regions-expected.txt:
+        * platform/mac/fast/regions/percentage-margins-variable-width-regions-expected.txt:
+        * platform/mac/fast/regions/region-overflow-auto-overflow-hidden-expected.txt:
+        * platform/mac/fast/regions/region-overflow-auto-overflow-visible-expected.txt:
+        * platform/mac/fast/regions/region-overflow-break-expected.txt:
+        * platform/mac/fast/regions/region-style-block-background-color-expected.txt:
+        * platform/mac/fast/regions/region-style-block-background-color2-expected.txt:
+        * platform/mac/fast/regions/region-style-image-background-color-expected.txt:
+        * platform/mac/fast/regions/region-style-inline-background-color-expected.txt:
+        * platform/mac/fast/regions/render-region-custom-style-mark-expected.txt:
+        * platform/mac/fast/regions/text-region-split-small-pagination-expected.txt:
+        * platform/mac/fast/regions/top-overflow-out-of-second-region-expected.txt:
+        * platform/mac/fast/regions/webkit-flow-double-pagination-float-push-expected.txt:
+        * platform/mac/fast/regions/webkit-flow-float-pushed-to-last-region-expected.txt:
+        * platform/mac/fast/regions/webkit-flow-float-unable-to-push-expected.txt:
+        * platform/mac/fast/regions/webkit-flow-floats-inside-regions-bounds-expected.txt:
+        * platform/mac/fast/regions/webkit-flow-inlines-inside-regions-bounds-expected.txt:
+        * platform/mac/fast/regions/webkit-flow-inlines-inside-regions-bounds-vertical-expected.txt:
+        * platform/mac/fast/regions/webkit-flow-inlines-inside-regions-bounds-vertical-rl-expected.txt:
+        * platform/mac/fast/repaint/japanese-rl-selection-repaint-in-regions-expected.txt:
+        * platform/mac/fast/repaint/line-flow-with-floats-in-regions-expected.txt:
+        * platform/mac/fast/repaint/overflow-flipped-writing-mode-block-in-regions-expected.txt:
+        * platform/mac/fast/repaint/region-painting-invalidation-expected.txt:
+        * platform/mac/fast/repaint/region-painting-via-layout-expected.txt:
+        * platform/qt/fast/repaint/line-flow-with-floats-in-regions-expected.txt:
+        * platform/qt/fast/repaint/overflow-flipped-writing-mode-block-in-regions-expected.txt:
+        * platform/qt/fast/repaint/region-painting-invalidation-expected.txt:
+        * platform/qt/fast/repaint/region-painting-via-layout-expected.txt:
+        * platform/win/fast/repaint/japanese-rl-selection-repaint-in-regions-expected.txt:
+
 2012-03-27  Ryosuke Niwa  <rniwa@webkit.org>
 
         Deleting a paragraph of text should not add elements for typing style

diff --git a/LayoutTests/platform/chromium-win/fast/repaint/region-painting-invalidation-expected.txt b/LayoutTests/platform/chromium-win/fast/repaint/region-painting-invalidation-expected.txt
@@ -10,7 +10,7 @@ layer at (0,0) size 800x600
 Flow Threads
   Thread with flow-name 'flow1'
     layer at (0,0) size 300x350
-      RenderFlowThread at (0,0) size 300x350
+      RenderNamedFlowThread at (0,0) size 300x350
         RenderBlock {DIV} at (0,0) size 300x350
           RenderBlock {DIV} at (0,0) size 300x350 [bgcolor=#008000]
   Regions for flow 'flow1'

diff --git a/LayoutTests/platform/mac/fast/regions/bottom-overflow-out-of-first-region-expected.txt b/LayoutTests/platform/mac/fast/regions/bottom-overflow-out-of-first-region-expected.txt
@@ -16,7 +16,7 @@ layer at (0,0) size 800x418
 Flow Threads
   Thread with flow-name 'flow1'
     layer at (0,0) size 400x300
-      RenderFlowThread at (0,0) size 400x300
+      RenderNamedFlowThread at (0,0) size 400x300
         RenderBlock {DIV} at (0,0) size 400x200
           RenderBlock {DIV} at (5,5) size 390x190 [border: (1px solid #0000FF)]
             RenderBlock {DIV} at (48,1) size 293x229 [border: (1px solid #008000)]

diff --git a/LayoutTests/platform/mac/fast/regions/flow-content-basic-expected.txt b/LayoutTests/platform/mac/fast/regions/flow-content-basic-expected.txt
@@ -19,7 +19,7 @@ layer at (0,0) size 800x194
 Flow Threads
   Thread with flow-name 'main-thread'
     layer at (0,0) size 300x100
-      RenderFlowThread at (0,0) size 300x100
+      RenderNamedFlowThread at (0,0) size 300x100
         RenderBlock {DIV} at (0,16) size 300x18 [color=#008000]
           RenderBlock {P} at (0,0) size 300x18
             RenderText {#text} at (0,0) size 79x18

diff --git a/LayoutTests/platform/mac/fast/regions/flow-content-basic-vertical-expected.txt b/LayoutTests/platform/mac/fast/regions/flow-content-basic-vertical-expected.txt
@@ -21,7 +21,7 @@ layer at (0,0) size 230x600
 Flow Threads
   Thread with flow-name 'main-thread'
     layer at (0,0) size 100x300
-      RenderFlowThread at (0,0) size 100x300
+      RenderNamedFlowThread at (0,0) size 100x300
         RenderBlock {DIV} at (16,0) size 18x300 [color=#008000]
           RenderBlock {P} at (0,0) size 18x300
             RenderText {#text} at (0,0) size 18x79

diff --git a/LayoutTests/platform/mac/fast/regions/flow-content-basic-vertical-rl-expected.txt b/LayoutTests/platform/mac/fast/regions/flow-content-basic-vertical-rl-expected.txt
@@ -22,7 +22,7 @@ layer at (446,0) size 354x600
 Flow Threads
   Thread with flow-name 'main-thread'
     layer at (600,0) size 200x300
-      RenderFlowThread at (0,0) size 200x300
+      RenderNamedFlowThread at (0,0) size 200x300
         RenderBlock {DIV} at (0,0) size 200x300 [color=#008000]
           RenderBlock {DIV} at (0,0) size 100x300
             RenderText {#text} at (0,0) size 18x107

diff --git a/...m/mac/fast/regions/multiple-directionality-changes-in-variable-width-regions-expected.txt b/...m/mac/fast/regions/multiple-directionality-changes-in-variable-width-regions-expected.txt
@@ -10,7 +10,7 @@ layer at (0,0) size 800x422
 Flow Threads
   Thread with flow-name 'flow1'
     layer at (0,0) size 500x400
-      RenderFlowThread at (0,0) size 500x400
+      RenderNamedFlowThread at (0,0) size 500x400
         RenderBlock {DIV} at (25,0) size 450x372
           RenderBlock {DIV} at (27,15) size 396x342 [border: (1px solid #0000FF)]
             RenderBlock {DIV} at (40,11) size 316x249 [border: (1px solid #008000)]

diff --git a/LayoutTests/platform/mac/fast/regions/overflow-in-uniform-regions-dynamic-expected.txt b/LayoutTests/platform/mac/fast/regions/overflow-in-uniform-regions-dynamic-expected.txt
@@ -14,7 +14,7 @@ layer at (0,0) size 800x532
 Flow Threads
   Thread with flow-name 'flow1'
     layer at (0,0) size 400x450
-      RenderFlowThread at (0,0) size 400x450
+      RenderNamedFlowThread at (0,0) size 400x450
         RenderBlock {DIV} at (0,0) size 400x232
           RenderBlock {DIV} at (5,5) size 390x222 [border: (1px solid #0000FF)]
             RenderBlock (floating) {DIV} at (6,6) size 50x50 [bgcolor=#00FF00]

diff --git a/LayoutTests/platform/mac/fast/regions/overflow-in-variable-width-regions-expected.txt b/LayoutTests/platform/mac/fast/regions/overflow-in-variable-width-regions-expected.txt
@@ -14,7 +14,7 @@ layer at (0,0) size 800x482
 Flow Threads
   Thread with flow-name 'flow1'
     layer at (0,0) size 300x400
-      RenderFlowThread at (0,0) size 300x400
+      RenderNamedFlowThread at (0,0) size 300x400
         RenderBlock {DIV} at (0,0) size 300x253
           RenderBlock {DIV} at (5,5) size 290x243 [border: (1px solid #0000FF)]
     layer at (46,46) size 208x161 clip at (47,47) size 206x159 scrollWidth 500

diff --git a/...form/mac/fast/regions/overflow-moving-below-floats-in-variable-width-regions-expected.txt b/...form/mac/fast/regions/overflow-moving-below-floats-in-variable-width-regions-expected.txt
@@ -14,7 +14,7 @@ layer at (0,0) size 800x482
 Flow Threads
   Thread with flow-name 'flow1'
     layer at (0,0) size 400x400
-      RenderFlowThread at (0,0) size 400x400
+      RenderNamedFlowThread at (0,0) size 400x400
         RenderBlock {DIV} at (0,0) size 400x305
           RenderBlock {DIV} at (5,5) size 390x295 [border: (1px solid #0000FF)]
             RenderBlock (floating) {DIV} at (1,1) size 50x50 [bgcolor=#00FF00]

diff --git a/.../mac/fast/regions/overflow-not-moving-below-floats-in-variable-width-regions-expected.txt b/.../mac/fast/regions/overflow-not-moving-below-floats-in-variable-width-regions-expected.txt
@@ -14,7 +14,7 @@ layer at (0,0) size 800x482
 Flow Threads
   Thread with flow-name 'flow1'
     layer at (0,0) size 400x400
-      RenderFlowThread at (0,0) size 400x400
+      RenderNamedFlowThread at (0,0) size 400x400
         RenderBlock {DIV} at (0,0) size 400x265
           RenderBlock {DIV} at (5,5) size 390x255 [border: (1px solid #0000FF)]
             RenderBlock (floating) {DIV} at (1,1) size 30x50 [bgcolor=#00FF00]

diff --git a/LayoutTests/platform/mac/fast/regions/overflow-rtl-in-variable-width-regions-expected.txt b/LayoutTests/platform/mac/fast/regions/overflow-rtl-in-variable-width-regions-expected.txt
@@ -14,7 +14,7 @@ layer at (0,0) size 800x482
 Flow Threads
   Thread with flow-name 'flow1'
     layer at (0,0) size 300x400
-      RenderFlowThread at (0,0) size 300x400
+      RenderNamedFlowThread at (0,0) size 300x400
         RenderBlock {DIV} at (0,0) size 300x253
           RenderBlock {DIV} at (5,5) size 290x243 [border: (1px solid #0000FF)]
     layer at (46,46) size 208x161 clip at (47,47) size 206x159 scrollWidth 500

diff --git a/...sts/platform/mac/fast/regions/overflow-size-change-in-variable-width-regions-expected.txt b/...sts/platform/mac/fast/regions/overflow-size-change-in-variable-width-regions-expected.txt
@@ -14,7 +14,7 @@ layer at (0,0) size 800x482
 Flow Threads
   Thread with flow-name 'flow1'
     layer at (0,0) size 300x400
-      RenderFlowThread at (0,0) size 300x400
+      RenderNamedFlowThread at (0,0) size 300x400
         RenderBlock {DIV} at (0,0) size 300x377
           RenderBlock {DIV} at (5,5) size 290x367 [border: (1px solid #0000FF)]
     layer at (41,6) size 218x365 clip at (42,7) size 216x363 scrollWidth 500

diff --git a/...utTests/platform/mac/fast/regions/overflow-size-change-with-stacking-context-expected.txt b/...utTests/platform/mac/fast/regions/overflow-size-change-with-stacking-context-expected.txt
@@ -14,7 +14,7 @@ layer at (0,0) size 800x482
 Flow Threads
   Thread with flow-name 'flow1'
     layer at (0,0) size 300x400
-      RenderFlowThread at (0,0) size 300x400
+      RenderNamedFlowThread at (0,0) size 300x400
         RenderBlock {DIV} at (0,0) size 300x359
           RenderBlock {DIV} at (5,5) size 290x349 [border: (1px solid #0000FF)]
     layer at (41,6) size 218x347 clip at (42,7) size 216x345 scrollWidth 500

diff --git a/...sts/platform/mac/fast/regions/overflow-size-change-with-stacking-context-rtl-expected.txt b/...sts/platform/mac/fast/regions/overflow-size-change-with-stacking-context-rtl-expected.txt
@@ -14,7 +14,7 @@ layer at (0,0) size 800x482
 Flow Threads
   Thread with flow-name 'flow1'
     layer at (0,0) size 300x400
-      RenderFlowThread at (0,0) size 300x400
+      RenderNamedFlowThread at (0,0) size 300x400
         RenderBlock {DIV} at (0,0) size 300x359
           RenderBlock {DIV} at (5,5) size 290x349 [border: (1px solid #0000FF)]
     layer at (41,6) size 218x347 clip at (42,7) size 216x345 scrollX 284 scrollWidth 500

diff --git a/...ests/platform/mac/fast/regions/percentage-margins-mixed-ltr-dominant-regions-expected.txt b/...ests/platform/mac/fast/regions/percentage-margins-mixed-ltr-dominant-regions-expected.txt
@@ -10,7 +10,7 @@ layer at (0,0) size 800x422
 Flow Threads
   Thread with flow-name 'flow1'
     layer at (0,0) size 300x400
-      RenderFlowThread at (0,0) size 300x400
+      RenderNamedFlowThread at (0,0) size 300x400
         RenderBlock {DIV} at (0,0) size 300x599
           RenderBlock {DIV} at (34,5) size 232x589 [border: (1px solid #0000FF)]
             RenderBlock {DIV} at (11,11) size 210x567 [border: (1px solid #008000)]

diff --git a/...ests/platform/mac/fast/regions/percentage-margins-mixed-rtl-dominant-regions-expected.txt b/...ests/platform/mac/fast/regions/percentage-margins-mixed-rtl-dominant-regions-expected.txt
@@ -10,7 +10,7 @@ layer at (0,0) size 800x422
 Flow Threads
   Thread with flow-name 'flow1'
     layer at (0,0) size 300x400
-      RenderFlowThread at (0,0) size 300x400
+      RenderNamedFlowThread at (0,0) size 300x400
         RenderBlock {DIV} at (0,0) size 300x599
           RenderBlock {DIV} at (34,5) size 232x589 [border: (1px solid #0000FF)]
             RenderBlock {DIV} at (11,11) size 210x567 [border: (1px solid #008000)]

diff --git a/...ests/platform/mac/fast/regions/percentage-margins-rtl-variable-width-regions-expected.txt b/...ests/platform/mac/fast/regions/percentage-margins-rtl-variable-width-regions-expected.txt
@@ -10,7 +10,7 @@ layer at (0,0) size 800x422
 Flow Threads
   Thread with flow-name 'flow1'
     layer at (0,0) size 300x400
-      RenderFlowThread at (0,0) size 300x400
+      RenderNamedFlowThread at (0,0) size 300x400
         RenderBlock {DIV} at (0,0) size 300x599
           RenderBlock {DIV} at (34,5) size 232x589 [border: (1px solid #0000FF)]
             RenderBlock {DIV} at (11,11) size 210x567 [border: (1px solid #008000)]

diff --git a/LayoutTests/platform/mac/fast/regions/percentage-margins-variable-width-regions-expected.txt b/LayoutTests/platform/mac/fast/regions/percentage-margins-variable-width-regions-expected.txt
@@ -10,7 +10,7 @@ layer at (0,0) size 800x422
 Flow Threads
   Thread with flow-name 'flow1'
     layer at (0,0) size 300x400
-      RenderFlowThread at (0,0) size 300x400
+      RenderNamedFlowThread at (0,0) size 300x400
         RenderBlock {DIV} at (0,0) size 300x599
           RenderBlock {DIV} at (34,5) size 232x589 [border: (1px solid #0000FF)]
             RenderBlock {DIV} at (11,11) size 210x567 [border: (1px solid #008000)]

diff --git a/...s/platform/mac/fast/regions/position-writing-modes-in-variable-width-regions-expected.txt b/...s/platform/mac/fast/regions/position-writing-modes-in-variable-width-regions-expected.txt
@@ -24,7 +24,7 @@ layer at (8,26) size 550x450
 Flow Threads
   Thread with flow-name 'flow1'
     layer at (0,0) size 500x450
-      RenderFlowThread at (0,0) size 500x450
+      RenderNamedFlowThread at (0,0) size 500x450
         RenderBlock {DIV} at (0,50) size 500x400
     layer at (50,50) size 400x400
       RenderBlock (relative positioned) {DIV} at (50,0) size 400x400

diff --git a/...tform/mac/fast/regions/positioned-objects-inline-static-spanning-regions-rtl-expected.txt b/...tform/mac/fast/regions/positioned-objects-inline-static-spanning-regions-rtl-expected.txt
@@ -14,7 +14,7 @@ layer at (0,0) size 800x532
 Flow Threads
   Thread with flow-name 'flow1'
     layer at (0,0) size 300x450
-      RenderFlowThread at (0,0) size 300x450
+      RenderNamedFlowThread at (0,0) size 300x450
         RenderBlock {DIV} at (0,30) size 300x350
           RenderBlock {DIV} at (30,0) size 240x350 [bgcolor=#CCCCCC]
     layer at (120,0) size 150x450

diff --git a/LayoutTests/platform/mac/fast/regions/region-overflow-auto-overflow-hidden-expected.txt b/LayoutTests/platform/mac/fast/regions/region-overflow-auto-overflow-hidden-expected.txt
@@ -11,7 +11,7 @@ layer at (0,0) size 800x422
 Flow Threads
   Thread with flow-name 'article'
     layer at (0,0) size 400x600
-      RenderFlowThread at (0,0) size 400x600
+      RenderNamedFlowThread at (0,0) size 400x600
         RenderBlock {DIV} at (0,0) size 400x688
           RenderBlock {DIV} at (0,0) size 400x396 [color=#A0A0A0]
             RenderInline {SPAN} at (0,0) size 400x381 [bgcolor=#A0A0A0]

diff --git a/LayoutTests/platform/mac/fast/regions/region-overflow-auto-overflow-visible-expected.txt b/LayoutTests/platform/mac/fast/regions/region-overflow-auto-overflow-visible-expected.txt
@@ -11,7 +11,7 @@ layer at (0,0) size 800x422
 Flow Threads
   Thread with flow-name 'article'
     layer at (0,0) size 400x600
-      RenderFlowThread at (0,0) size 400x600
+      RenderNamedFlowThread at (0,0) size 400x600
         RenderBlock {DIV} at (0,0) size 400x688
           RenderBlock {DIV} at (0,0) size 400x396 [color=#A0A0A0]
             RenderInline {SPAN} at (0,0) size 400x381 [bgcolor=#A0A0A0]

diff --git a/LayoutTests/platform/mac/fast/regions/region-overflow-break-expected.txt b/LayoutTests/platform/mac/fast/regions/region-overflow-break-expected.txt
@@ -11,7 +11,7 @@ layer at (0,0) size 800x422
 Flow Threads
   Thread with flow-name 'article'
     layer at (0,0) size 400x600
-      RenderFlowThread at (0,0) size 400x600
+      RenderNamedFlowThread at (0,0) size 400x600
         RenderBlock {DIV} at (0,0) size 400x696
           RenderBlock {DIV} at (0,0) size 400x396 [color=#A0A0A0]
             RenderInline {SPAN} at (0,0) size 400x381 [bgcolor=#A0A0A0]

diff --git a/LayoutTests/platform/mac/fast/regions/region-style-block-background-color-expected.txt b/LayoutTests/platform/mac/fast/regions/region-style-block-background-color-expected.txt
@@ -20,7 +20,7 @@ layer at (0,0) size 800x556
 Flow Threads
   Thread with flow-name 'flow1'
     layer at (0,0) size 280x30
-      RenderFlowThread at (0,0) size 280x30
+      RenderNamedFlowThread at (0,0) size 280x30
         RenderBlock {DIV} at (0,16) size 280x18
           RenderBlock {P} at (0,0) size 280x18 [bgcolor=#FF0000]
             RenderText {#text} at (0,0) size 258x18
@@ -29,7 +29,7 @@ Flow Threads
     RenderRegion {DIV} #region1 region style: 1
   Thread with flow-name 'flow2'
     layer at (0,0) size 280x80
-      RenderFlowThread at (0,0) size 280x80
+      RenderNamedFlowThread at (0,0) size 280x80
         RenderBlock {DIV} at (0,16) size 280x52
           RenderBlock {P} at (0,0) size 280x18 [bgcolor=#FF0000]
             RenderText {#text} at (0,0) size 266x18
@@ -42,7 +42,7 @@ Flow Threads
     RenderRegion {DIV} #region22 region style: 1
   Thread with flow-name 'flow3'
     layer at (0,0) size 280x130
-      RenderFlowThread at (0,0) size 280x130
+      RenderNamedFlowThread at (0,0) size 280x130
         RenderBlock {DIV} at (0,16) size 280x102
           RenderBlock {P} at (0,0) size 280x102 [bgcolor=#FF0000]
             RenderText {#text} at (0,0) size 266x102
@@ -56,7 +56,7 @@ Flow Threads
     RenderRegion {DIV} #region31 region style: 1
   Thread with flow-name 'flow41'
     layer at (0,0) size 280x80
-      RenderFlowThread at (0,0) size 280x80
+      RenderNamedFlowThread at (0,0) size 280x80
         RenderBlock {DIV} at (0,16) size 280x52
           RenderBlock {P} at (0,0) size 280x18 [bgcolor=#FF0000]
             RenderText {#text} at (0,0) size 270x18
@@ -69,7 +69,7 @@ Flow Threads
     RenderRegion {DIV} #region41 region style: 1
   Thread with flow-name 'flow42'
     layer at (0,0) size 280x80
-      RenderFlowThread at (0,0) size 280x80
+      RenderNamedFlowThread at (0,0) size 280x80
         RenderBlock {DIV} at (0,16) size 280x52
           RenderBlock {P} at (0,0) size 280x18 [bgcolor=#FF0000]
             RenderText {#text} at (0,0) size 264x18
@@ -82,7 +82,7 @@ Flow Threads
     RenderRegion {DIV} #region42 region style: 1
   Thread with flow-name 'flow5'
     layer at (0,0) size 280x30
-      RenderFlowThread at (0,0) size 280x30
+      RenderNamedFlowThread at (0,0) size 280x30
         RenderBlock {DIV} at (0,16) size 280x18
           RenderBlock {P} at (0,0) size 280x18 [bgcolor=#FF0000]
             RenderInline {I} at (0,0) size 270x18
@@ -93,7 +93,7 @@ Flow Threads
     RenderRegion {DIV} #region5 region style: 1
   Thread with flow-name 'flow6'
     layer at (0,0) size 280x30
-      RenderFlowThread at (0,0) size 280x30
+      RenderNamedFlowThread at (0,0) size 280x30
         RenderBlock {DIV} at (0,16) size 280x18
           RenderBlock {P} at (0,0) size 280x18 [bgcolor=#FF0000]
             RenderText {#text} at (0,0) size 253x18
@@ -102,7 +102,7 @@ Flow Threads
     RenderRegion {DIV} #region6 region style: 1
   Thread with flow-name 'flow7'
     layer at (0,0) size 280x80
-      RenderFlowThread at (0,0) size 280x80
+      RenderNamedFlowThread at (0,0) size 280x80
         RenderBlock {DIV} at (0,16) size 280x52
           RenderBlock {P} at (0,0) size 280x52 [bgcolor=#008000]
             RenderText {#text} at (0,0) size 261x52

diff --git a/LayoutTests/platform/mac/fast/regions/region-style-block-background-color2-expected.txt b/LayoutTests/platform/mac/fast/regions/region-style-block-background-color2-expected.txt
@@ -22,7 +22,7 @@ layer at (0,0) size 800x546
 Flow Threads
   Thread with flow-name 'flow1'
     layer at (0,0) size 280x50
-      RenderFlowThread at (0,0) size 280x50
+      RenderNamedFlowThread at (0,0) size 280x50
         RenderBlock {DIV} at (0,16) size 280x18
           RenderBlock {P} at (0,0) size 280x18 [bgcolor=#FF0000]
             RenderText {#text} at (0,0) size 258x18
@@ -32,7 +32,7 @@ Flow Threads
   Thread with flow-name 'flow2'
   Thread with flow-name 'flow3'
     layer at (0,0) size 280x80
-      RenderFlowThread at (0,0) size 280x80
+      RenderNamedFlowThread at (0,0) size 280x80
         RenderBlock {DIV} at (0,16) size 280x52
           RenderBlock {P} at (0,0) size 280x18 [bgcolor=#FF0000]
             RenderText {#text} at (0,0) size 266x18
@@ -45,7 +45,7 @@ Flow Threads
     RenderRegion {DIV} #region32 region style: 1
   Thread with flow-name 'flow4'
     layer at (0,0) size 280x80
-      RenderFlowThread at (0,0) size 280x80
+      RenderNamedFlowThread at (0,0) size 280x80
         RenderBlock {DIV} at (0,16) size 280x52
           RenderBlock {P} at (0,0) size 280x18 [bgcolor=#FF0000]
             RenderText {#text} at (0,0) size 266x18
@@ -58,7 +58,7 @@ Flow Threads
     RenderRegion {DIV} #region42 region style: 1
   Thread with flow-name 'flow5'
     layer at (0,0) size 280x110
-      RenderFlowThread at (0,0) size 280x110
+      RenderNamedFlowThread at (0,0) size 280x110
         RenderBlock {DIV} at (0,16) size 280x52
           RenderBlock {P} at (0,0) size 280x18 [bgcolor=#FF0000]
             RenderText {#text} at (0,0) size 266x18
@@ -71,7 +71,7 @@ Flow Threads
     RenderRegion {DIV} #region52 region style: 1
   Thread with flow-name 'flow6'
     layer at (0,0) size 280x80
-      RenderFlowThread at (0,0) size 280x80
+      RenderNamedFlowThread at (0,0) size 280x80
         RenderBlock {DIV} at (0,16) size 280x52
           RenderBlock {P} at (0,0) size 280x18 [bgcolor=#FF0000]
             RenderText {#text} at (0,0) size 266x18
@@ -84,7 +84,7 @@ Flow Threads
     RenderRegion {DIV} #region62 region style: 1
   Thread with flow-name 'flow7'
     layer at (0,0) size 280x80
-      RenderFlowThread at (0,0) size 280x80
+      RenderNamedFlowThread at (0,0) size 280x80
         RenderBlock {DIV} at (0,16) size 280x52
           RenderBlock {P} at (0,0) size 280x18 [bgcolor=#FF0000]
             RenderText {#text} at (0,0) size 266x18