Remove document.rootScroller compositing clipping effects.

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

 /*
  * Copyright (C) 2003, 2009, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Intel Corporation. All rights reserved.
  *
  * Portions are Copyright (C) 1998 Netscape Communications Corporation.
  *
  * Other contributors:
  *   Robert O'Callahan <roc+@cs.cmu.edu>
  *   David Baron <dbaron@fas.harvard.edu>
  *   Christian Biesinger <cbiesinger@web.de>
@@ skipping 691 matching lines @@
   bool needsCompositingInputsUpdate() const {
     return m_needsAncestorDependentCompositingInputsUpdate;
   }
 
   void updateAncestorOverflowLayer(const PaintLayer* ancestorOverflowLayer) {
     m_ancestorOverflowLayer = ancestorOverflowLayer;
   }
   void updateAncestorDependentCompositingInputs(
       const AncestorDependentCompositingInputs&,
       bool hasAncestorWithClipPath);
-  void updateDescendantDependentCompositingInputs(
-      bool hasDescendantWithClipPath,
-      bool hasNonIsolatedDescendantWithBlendMode,
-      bool hasRootScrollerAsDescendant);
   void didUpdateCompositingInputs();
 
   const IntRect& clippedAbsoluteBoundingBox() const {
     DCHECK(!m_needsAncestorDependentCompositingInputsUpdate);
     return m_ancestorDependentCompositingInputs->clippedAbsoluteBoundingBox;
   }
   const IntRect& unclippedAbsoluteBoundingBox() const {
     DCHECK(!m_needsAncestorDependentCompositingInputsUpdate);
     return m_ancestorDependentCompositingInputs->unclippedAbsoluteBoundingBox;
   }
@@ skipping 57 matching lines @@
 
   // Returns true if there is a descendant with blend-mode that is
   // not contained within another enclosing stacking context other
   // than the stacking context blend-mode creates, or the stacking
   // context this PaintLayer might create. This is needed because
   // blend-mode content needs to blend with the containing stacking
   // context's painted output, but not the content in any grandparent
   // stacking contexts.
   bool hasNonIsolatedDescendantWithBlendMode() const;
 
-  bool hasRootScrollerAsDescendant() const {
-    DCHECK(!m_needsDescendantDependentFlagsUpdate);
-    return m_hasRootScrollerAsDescendant;
-  }
-
   bool lostGroupedMapping() const {
     DCHECK(isAllowedToQueryCompositingState());
     return m_lostGroupedMapping;
   }
   void setLostGroupedMapping(bool b) { m_lostGroupedMapping = b; }
 
   CompositingReasons getCompositingReasons() const {
     DCHECK(isAllowedToQueryCompositingState());
     return m_rareData ? m_rareData->compositingReasons : CompositingReasonNone;
   }
@@ skipping 391 matching lines @@
   unsigned m_needsPaintPhaseFloat : 1;
   unsigned m_previousPaintPhaseFloatWasEmpty : 1;
   unsigned m_needsPaintPhaseDescendantBlockBackgrounds : 1;
   unsigned m_previousPaintPhaseDescendantBlockBackgroundsWasEmpty : 1;
 
   // These bitfields are part of ancestor/descendant dependent compositing
   // inputs.
   unsigned m_hasDescendantWithClipPath : 1;
   unsigned m_hasNonIsolatedDescendantWithBlendMode : 1;
   unsigned m_hasAncestorWithClipPath : 1;
-  unsigned m_hasRootScrollerAsDescendant : 1;
 
   unsigned m_selfPaintingStatusChanged : 1;
 
   LayoutBoxModelObject& m_layoutObject;
 
   PaintLayer* m_parent;
   PaintLayer* m_previous;
   PaintLayer* m_next;
   PaintLayer* m_first;
   PaintLayer* m_last;
@@ skipping 36 matching lines @@
 
 }  // namespace blink
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 CORE_EXPORT void showLayerTree(const blink::PaintLayer*);
 CORE_EXPORT void showLayerTree(const blink::LayoutObject*);
 #endif
 
 #endif  // Layer_h