Recompute overflow after transform changes

Source/core/rendering/RenderObject.h

Index: Source/core/rendering/RenderObject.h
diff --git a/Source/core/rendering/RenderObject.h b/Source/core/rendering/RenderObject.h
index 904bf8ffd7d1dfa8e33655c996413c57f9af6b12..152c6e23f85045f59fa071f06e2f5e9a0526eea5 100644
--- a/Source/core/rendering/RenderObject.h
+++ b/Source/core/rendering/RenderObject.h
@@ -565,6 +565,10 @@ public:
 
     bool preferredLogicalWidthsDirty() const { return m_bitfields.preferredLogicalWidthsDirty(); }
 
+    bool needsOverflowRecalcAfterStyleChange() const { return m_bitfields.selfNeedsOverflowRecalcAfterStyleChange() || m_bitfields.childNeedsOverflowRecalcAfterStyleChange(); }
+    bool selfNeedsOverflowRecalcAfterStyleChange() const { return m_bitfields.selfNeedsOverflowRecalcAfterStyleChange(); }
+    bool childNeedsOverflowRecalcAfterStyleChange() const { return m_bitfields.childNeedsOverflowRecalcAfterStyleChange(); }
+
     bool isSelectionBorder() const;
 
     bool hasClip() const { return isOutOfFlowPositioned() && style()->hasClip(); }
@@ -634,7 +638,6 @@ public:
     void clearNeedsLayout();
     void setChildNeedsLayout(MarkingBehavior = MarkContainingBlockChain, SubtreeLayoutScope* = 0);
     void setNeedsPositionedMovementLayout();
-    void setNeedsSimplifiedNormalFlowLayout();
     void setPreferredLogicalWidthsDirty(MarkingBehavior = MarkContainingBlockChain);
     void clearPreferredLogicalWidthsDirty();
     void invalidateContainerPreferredLogicalWidths();
@@ -1011,6 +1014,9 @@ public:
 
     bool shouldDisableLayoutState() const { return hasColumns() || hasTransform() || hasReflection() || style()->isFlippedBlocksWritingMode(); }
 
+    void setNeedsOverflowRecalcAfterStyleChange();
+    void markContainingBlocksForOverflowRecalc();
+
 protected:
     inline bool layerCreationAllowedForSubtree() const;
 
@@ -1128,6 +1134,8 @@ private:
             , m_needsSimplifiedNormalFlowLayout(false)
             , m_preferredLogicalWidthsDirty(false)
             , m_floating(false)
+            , m_selfNeedsOverflowRecalcAfterStyleChange(false)
+            , m_childNeedsOverflowRecalcAfterStyleChange(false)
             , m_isAnonymous(!node)
             , m_isText(false)
             , m_isBox(false)
@@ -1165,6 +1173,8 @@ private:
         ADD_BOOLEAN_BITFIELD(needsSimplifiedNormalFlowLayout, NeedsSimplifiedNormalFlowLayout);
         ADD_BOOLEAN_BITFIELD(preferredLogicalWidthsDirty, PreferredLogicalWidthsDirty);
         ADD_BOOLEAN_BITFIELD(floating, Floating);
+        ADD_BOOLEAN_BITFIELD(selfNeedsOverflowRecalcAfterStyleChange, SelfNeedsOverflowRecalcAfterStyleChange);
+        ADD_BOOLEAN_BITFIELD(childNeedsOverflowRecalcAfterStyleChange, ChildNeedsOverflowRecalcAfterStyleChange);
 
         ADD_BOOLEAN_BITFIELD(isAnonymous, IsAnonymous);
         ADD_BOOLEAN_BITFIELD(isText, IsText);
@@ -1233,6 +1243,8 @@ private:
     void setIsDragging(bool b) { m_bitfields.setIsDragging(b); }
     void setEverHadLayout(bool b) { m_bitfields.setEverHadLayout(b); }
     void setShouldRepaintOverflow(bool b) { m_bitfields.setShouldRepaintOverflow(b); }
+    void setSelfNeedsOverflowRecalcAfterStyleChange(bool b) { m_bitfields.setSelfNeedsOverflowRecalcAfterStyleChange(b); }
+    void setChildNeedsOverflowRecalcAfterStyleChange(bool b) { m_bitfields.setChildNeedsOverflowRecalcAfterStyleChange(b); }
 
 private:
     // Store state between styleWillChange and styleDidChange
@@ -1334,18 +1346,6 @@ inline void RenderObject::setNeedsPositionedMovementLayout()
     }
 }
 
-inline void RenderObject::setNeedsSimplifiedNormalFlowLayout()
-{
-    bool alreadyNeededLayout = needsSimplifiedNormalFlowLayout();
-    setNeedsSimplifiedNormalFlowLayout(true);
-    ASSERT(!isSetNeedsLayoutForbidden());
-    if (!alreadyNeededLayout) {
-        markContainingBlocksForLayout();
-        if (hasLayer())
-            setLayerNeedsFullRepaint();
-    }
-}
-
 inline bool RenderObject::preservesNewline() const
 {
     if (isSVGInlineText())