Backed out changeset 6a7c866d716d (bug 1890523) for causing wpt failu…

…res in stretchy-largeop-with-default-font-2.html. CLOSED TREE

layout/mathml/nsMathMLmoFrame.cpp

@@ -596,15 +596,9 @@ nsMathMLmoFrame::Stretch(DrawTarget* aDrawTarget,
 
   // get the leading to be left at the top and the bottom of the stretched char
   // this seems more reliable than using fm->GetLeading() on suspicious fonts
-  const nscoord leading = [&fm] {
-    if (StaticPrefs::
-            mathml_top_bottom_spacing_for_stretchy_operators_disabled()) {
-      return 0;
-    }
-    nscoord em;
-    GetEmHeight(fm, em);
-    return NSToCoordRound(0.2f * (float)em);
-  }();
+  nscoord em;
+  GetEmHeight(fm, em);
+  nscoord leading = NSToCoordRound(0.2f * em);
 
   // Operators that are stretchy, or those that are to be centered
   // to cater for fonts that are not math-aware, are handled by the MathMLChar

modules/libpref/init/StaticPrefList.yaml

@@ -9548,13 +9548,6 @@
   mirror: always
   rust: true
 
-# Whether to disable extra top/bottom spacing for stretchy operators.
-- name: mathml.top_bottom_spacing_for_stretchy_operators.disabled
-  type: bool
-  value: true
-  mirror: always
-  rust: true
-
 #---------------------------------------------------------------------------
 # Prefs starting with "media."
 #---------------------------------------------------------------------------

testing/web-platform/meta/mathml/presentation-markup/mrow/stretch-along-block-axis-001.html.ini

@@ -1,6 +1,17 @@
 [stretch-along-block-axis-001.html]
+  expected:
+    if (os == "android") and fission: [OK, TIMEOUT]
+  [Taking into account stretch axis.]
+    expected: FAIL
+
+  [Taking into account stretchy property.]
+    expected: FAIL
+
   [Only operators with a stretchy property and block stretch axis.]
     expected: FAIL
 
   [Operators smaller and larger than non-stretchy siblings.]
     expected: FAIL
+
+  [Embellished operators]
+    expected: FAIL

testing/web-platform/meta/mathml/presentation-markup/operators/mo-minsize-maxsize-001.html.ini

@@ -1,6 +1,20 @@
 [mo-minsize-maxsize-001.html]
+  expected:
+    if (os == "android") and fission: [OK, TIMEOUT]
   [minsize < maxsize < 0 is treated as maxsize = minsize = 0]
     expected: FAIL
 
+  [minsize < 0 is treated as 0]
+    expected: FAIL
+
+  [target size = 0 is treated as Tascent = Tdescent = minsize/2]
+    expected: FAIL
+
+  [maxsize < minsize is treated as maxsize = minsize]
+    expected: FAIL
+
   [minsize/maxsize percentages are relative to the target size]
     expected: FAIL
+
+  [default minsize/maxsize percentages]
+    expected: FAIL

testing/web-platform/meta/mathml/presentation-markup/operators/mo-stretch-properties-001.html.ini

@@ -0,0 +1,5 @@
+[mo-stretch-properties-001.html]
+  expected:
+    if (os == "android") and fission: [OK, TIMEOUT]
+  [Stretchy vertical line]
+    expected: FAIL

testing/web-platform/meta/mathml/presentation-markup/operators/mo-stretch-properties-dynamic-001.html.ini

@@ -0,0 +1,17 @@
+[mo-stretch-properties-dynamic-001.html]
+  expected:
+    if (os == "android") and fission: [OK, TIMEOUT]
+  [symmetric]
+    expected: FAIL
+
+  [largeop]
+    expected: FAIL
+
+  [minsize]
+    expected: FAIL
+
+  [maxsize]
+    expected: FAIL
+
+  [stretchy]
+    expected: FAIL