Delete scrollCompensationAdjustment.

third_party/WebKit/public/platform/WebLayer.h

 /*
  * Copyright (C) 2011 Google 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
@@ skipping 137 matching lines @@
     virtual void setScrollParent(WebLayer*) = 0;
 
     // A layer will not respect any clips established by layers between it and
     // its nearest clipping ancestor. Note, the clip parent must be an ancestor.
     // This is not a requirement of the scroll parent.
     virtual void setClipParent(WebLayer*) = 0;
 
     // Scrolling
     virtual void setScrollPositionDouble(WebDoublePoint) = 0;
     virtual WebDoublePoint scrollPositionDouble() const = 0;
-    // Blink tells cc the scroll offset through setScrollPositionDouble() using
-    // floating precision but it currently can only position cc layers at integer
-    // boundary. So Blink needs to also call setScrollCompensationAdjustment()
-    // to tell cc what's the part of the scroll offset that Blink doesn't handle
-    // but cc needs to take into consideration, e.g. compensating
-    // for fixed-position layer that's positioned in Blink using only integer scroll
-    // offset.
-    // We make this call explicit, instead of letting cc to infer the fractional part
-    // from the scroll offset, to be clear that this is Blink's limitation. Once
-    // Blink can fully handle fractional scroll offset, it can stop calling
-    // this function and cc side would just work.
-    virtual void setScrollCompensationAdjustment(WebDoublePoint) = 0;
 
     // To set a WebLayer as scrollable we must specify the corresponding clip layer.
     virtual void setScrollClipLayer(WebLayer*) = 0;
     virtual bool scrollable() const = 0;
     virtual void setUserScrollable(bool horizontal, bool vertical) = 0;
     virtual bool userScrollableHorizontal() const = 0;
     virtual bool userScrollableVertical() const = 0;
 
     // Indicates that this layer will always scroll on the main thread for the provided reason.
     virtual void addMainThreadScrollingReasons(uint32_t) = 0;
@@ skipping 41 matching lines @@
     virtual void setElementId(uint64_t) = 0;
     virtual uint64_t elementId() const = 0;
 
     virtual void setCompositorMutableProperties(uint32_t) = 0;
     virtual uint32_t compositorMutableProperties() const = 0;
 };
 
 } // namespace blink
 
 #endif // WebLayer_h