Remove document.rootScroller compositing clipping effects.

third_party/WebKit/Source/core/paint/PaintLayer.h

Index: third_party/WebKit/Source/core/paint/PaintLayer.h
diff --git a/third_party/WebKit/Source/core/paint/PaintLayer.h b/third_party/WebKit/Source/core/paint/PaintLayer.h
index 722352becf6fc58e6e514082a7718b0e50d9d824..ad43b9fa89ac805c63f1718b203b520c6332e36e 100644
--- a/third_party/WebKit/Source/core/paint/PaintLayer.h
+++ b/third_party/WebKit/Source/core/paint/PaintLayer.h
@@ -709,10 +709,6 @@ class CORE_EXPORT PaintLayer : public DisplayItemClient {
   void updateAncestorDependentCompositingInputs(
       const AncestorDependentCompositingInputs&,
       bool hasAncestorWithClipPath);
-  void updateDescendantDependentCompositingInputs(
-      bool hasDescendantWithClipPath,
-      bool hasNonIsolatedDescendantWithBlendMode,
-      bool hasRootScrollerAsDescendant);
   void didUpdateCompositingInputs();
 
   const IntRect& clippedAbsoluteBoundingBox() const {
@@ -790,11 +786,6 @@ class CORE_EXPORT PaintLayer : public DisplayItemClient {
   // stacking contexts.
   bool hasNonIsolatedDescendantWithBlendMode() const;
 
-  bool hasRootScrollerAsDescendant() const {
-    DCHECK(!m_needsDescendantDependentFlagsUpdate);
-    return m_hasRootScrollerAsDescendant;
-  }
-
   bool lostGroupedMapping() const {
     DCHECK(isAllowedToQueryCompositingState());
     return m_lostGroupedMapping;
@@ -1206,7 +1197,6 @@ class CORE_EXPORT PaintLayer : public DisplayItemClient {
   unsigned m_hasDescendantWithClipPath : 1;
   unsigned m_hasNonIsolatedDescendantWithBlendMode : 1;
   unsigned m_hasAncestorWithClipPath : 1;
-  unsigned m_hasRootScrollerAsDescendant : 1;
 
   unsigned m_selfPaintingStatusChanged : 1;