Backed out changeset 0a2d8e926a66 (bug 1224251)

layout/base/RestyleManager.cpp

@@ -854,21 +854,6 @@ RestyleManager::ProcessRestyledFrames(nsStyleChangeList& aChangeList)
         didReflowThisFrame = true;
       }
 
-      if ((hint & nsChangeHint_UpdateUsesOpacity) &&
-          frame->IsFrameOfType(nsIFrame::eTablePart)) {
-        NS_ASSERTION(hint & nsChangeHint_UpdateOpacityLayer,
-                     "should only return UpdateUsesOpacity hint "
-                     "when also returning UpdateOpacityLayer hint");
-        // When an internal table part (including cells) changes between
-        // having opacity 1 and non-1, it changes whether its
-        // backgrounds (and those of table parts inside of it) are
-        // painted as part of the table's nsDisplayTableBorderBackground
-        // display item, or part of its own display item.  That requires
-        // invalidation, so change UpdateOpacityLayer to RepaintFrame.
-        hint &= ~nsChangeHint_UpdateOpacityLayer;
-        hint |= nsChangeHint_RepaintFrame;
-      }
-
       if (hint & (nsChangeHint_RepaintFrame | nsChangeHint_SyncFrameView |
                   nsChangeHint_UpdateOpacityLayer | nsChangeHint_UpdateTransformLayer |
                   nsChangeHint_ChildrenOnlyTransform | nsChangeHint_SchedulePaint)) {

layout/reftests/table-background/reftest.list

@@ -58,5 +58,5 @@ skip-if(B2G||Mulet) == border-separate-opacity-table.html border-separate-opacit
 == scrollable-rowgroup-separate-border.html scrollable-rowgroup-separate-notref.html # scrolling rowgroups were removed in bug 28800
 == empty-cells-default-1.html empty-cells-default-1-ref.html
 == empty-cells-default-2.html empty-cells-default-2-ref.html
-== table-row-opacity-dynamic-1.html table-row-opacity-dynamic-1-ref.html
-== table-row-opacity-dynamic-2.html table-row-opacity-dynamic-2-ref.html
+fails == table-row-opacity-dynamic-1.html table-row-opacity-dynamic-1-ref.html # bug 1224253
+fails == table-row-opacity-dynamic-2.html table-row-opacity-dynamic-2-ref.html # bug 1224251