Remove WebViewImpl helper methods for setting scroll offset.

public/web/WebWidget.h

 
 /*
  * Copyright (C) 2009 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 139 matching lines @@
     // thread.
     virtual void applyViewportDeltas(
         const WebSize& scrollDelta,
         float scaleFactor,
         float topControlsShownRatioDelta) { }
 
     // Applies viewport related properties during a commit from the compositor
     // thread.
     virtual void applyViewportDeltas(
         const WebFloatSize& pinchViewportDelta,
-        const WebFloatSize& mainFrameDelta,
+        const WebFloatSize& layoutViewportDelta,
         const WebFloatSize& elasticOverscrollDelta,
         float scaleFactor,
         float topControlsShownRatioDelta) { }
 
     // Records composite or render events for the Performance Timeline.
     // See http://w3c.github.io/frame-timing/ for definition of terms.
     enum FrameTimingEventType {
         CompositeEvent,
         RenderEvent,
     };
@@ skipping 111 matching lines @@
     // control what are valid states for top controls and if it should animate.
     virtual void updateTopControlsState(WebTopControlsState constraints, WebTopControlsState current, bool animate) { }
 
 protected:
     ~WebWidget() { }
 };
 
 } // namespace blink
 
 #endif