Correct for enclosing layers scroll position in sticky_data->main_thread_offset

third_party/WebKit/Source/core/layout/compositing/CompositedLayerMapping.h

 /*
  * Copyright (C) 2009, 2010, 2011 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 229 matching lines @@
   bool needsToReparentOverflowControls() const;
 
   // Removes the overflow controls host layer from its parent and positions it
   // so that it can be inserted as a sibling to this CLM without changing
   // position.
   GraphicsLayer* detachLayerForOverflowControls();
 
   void updateFilters(const ComputedStyle&);
   void updateBackdropFilters(const ComputedStyle&);
 
-  void updateStickyConstraints(const ComputedStyle&);
-
   void setBlendMode(WebBlendMode);
 
   bool needsGraphicsLayerUpdate() {
     return m_pendingUpdateScope > GraphicsLayerUpdateNone;
   }
   void setNeedsGraphicsLayerUpdate(GraphicsLayerUpdateScope scope) {
     m_pendingUpdateScope = std::max(
         static_cast<GraphicsLayerUpdateScope>(m_pendingUpdateScope), scope);
   }
   void clearNeedsGraphicsLayerUpdate() {
@@ skipping 96 matching lines @@
       const IntRect& relativeCompositingBounds);
   void updateForegroundLayerGeometry(
       const FloatSize& relativeCompositingBoundsSize,
       const IntRect& clippingBox);
   void updateBackgroundLayerGeometry(
       const FloatSize& relativeCompositingBoundsSize);
   void updateDecorationOutlineLayerGeometry(
       const FloatSize& relativeCompositingBoundsSize);
   void updateScrollingLayerGeometry(const IntRect& localCompositingBounds);
   void updateChildClippingMaskLayerGeometry();
+  void updateStickyConstraints(const ComputedStyle&, const PaintLayer*);
 
   void createPrimaryGraphicsLayer();
   void destroyGraphicsLayers();
 
   std::unique_ptr<GraphicsLayer> createGraphicsLayer(
       CompositingReasons,
       SquashingDisallowedReasons = SquashingDisallowedReasonsNone);
   bool toggleScrollbarLayerIfNeeded(std::unique_ptr<GraphicsLayer>&,
                                     bool needsLayer,
                                     CompositingReasons);
@@ skipping 324 matching lines @@
   unsigned m_backgroundPaintsOntoGraphicsLayer : 1;
 
   bool m_drawsBackgroundOntoContentLayer;
 
   friend class CompositedLayerMappingTest;
 };
 
 }  // namespace blink
 
 #endif  // CompositedLayerMapping_h