AX: Relative frames for RenderTables aren't being cached

https://bugs.webkit.org/show_bug.cgi?id=267913
rdar://problem/121417745

Reviewed by Tyler Wilcock.

We had not been caching the relative frame of RenderTables on paint since they override RenderBlock::paintObject.

This starts caching those frames on paint.

* LayoutTests/accessibility-isolated-tree/TestExpectations:
* Source/WebCore/rendering/RenderTable.cpp:
(WebCore::RenderTable::paintObject):

Canonical link: https://commits.webkit.org/273394@main

LayoutTests/accessibility-isolated-tree/TestExpectations

@@ -37,6 +37,7 @@ accessibility/mac/attributed-string/attributed-string-has-completion-annotation.
 # Frames are off by 1px vs. non-ITM mode.
 accessibility/table-cells.html [ Failure ]
 accessibility/mac/document-links.html [ Failure ]
+accessibility/table-with-rules.html [ Failure ]
 
 accessibility/aria-owns-hierarchy-remap.html [ Failure ]
 accessibility/element-reflection-ariaactivedescendant.html [ Failure ]

Source/WebCore/rendering/RenderTable.cpp

@@ -744,6 +744,9 @@ void RenderTable::paintObject(PaintInfo& paintInfo, const LayoutPoint& paintOffs
         return;
     }
 
+    if (paintPhase == PaintPhase::Accessibility)
+        paintInfo.accessibilityRegionContext()->takeBounds(*this, paintOffset);
+
     // We're done.  We don't bother painting any children.
     if (paintPhase == PaintPhase::BlockBackground)
         return;