Replace adjustment of previous visual rects on scroll with normal paint invalidation

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 274 matching lines @@
   PaintLayerCompositor* compositor() const;
 
   // Notification from the layoutObject that its content changed (e.g. current
   // frame of image changed).  Allows updates of layer content without
   // invalidating paint.
   void contentChanged(ContentChangeType);
 
   void updateLayerPosition();
 
   void updateLayerPositionsAfterLayout();
-  void updateLayerPositionsAfterOverflowScroll(const DoubleSize& scrollDelta);
+  void updateLayerPositionsAfterOverflowScroll();
 
   PaintLayer* enclosingPaginationLayer() const {
     return m_rareData ? m_rareData->enclosingPaginationLayer : nullptr;
   }
 
   void updateTransformationMatrix();
   PaintLayer* renderingContextRoot();
   const PaintLayer* renderingContextRoot() const;
 
   LayoutSize offsetForInFlowPosition() const {
@@ skipping 677 matching lines @@
   void setNeedsCompositingInputsUpdateInternal();
 
   // Bounding box in the coordinates of this layer.
   LayoutRect logicalBoundingBox() const;
 
   bool hasOverflowControls() const;
 
   void dirtyAncestorChainHasSelfPaintingLayerDescendantStatus();
 
   void updateLayerPositionRecursive();
-  void updateLayerPositionsAfterScrollRecursive(
-      const DoubleSize& scrollDelta,
-      bool paintInvalidationContainerWasScrolled);
 
   void setNextSibling(PaintLayer* next) { m_next = next; }
   void setPreviousSibling(PaintLayer* prev) { m_previous = prev; }
   void setFirstChild(PaintLayer* first) { m_first = first; }
   void setLastChild(PaintLayer* last) { m_last = last; }
 
   void updateHasSelfPaintingLayerDescendant() const;
   PaintLayer* hitTestLayer(PaintLayer* rootLayer,
                            PaintLayer* containerLayer,
                            HitTestResult&,
@@ skipping 228 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