Move handling of DraggableRegionsChanged notification from "view" to "frame".

third_party/WebKit/public/web/WebViewClient.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.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 209 matching lines @@
 
   // Zoom ----------------------------------------------------------------
 
   // Informs the browser that the zoom levels for this frame have changed from
   // the default values.
   virtual void ZoomLimitsChanged(double minimum_level, double maximum_level) {}
 
   // Informs the browser that the page scale has changed.
   virtual void PageScaleFactorChanged() {}
 
-  // Draggable regions ----------------------------------------------------
-
-  // Informs the browser that the draggable regions have been updated.
-  virtual void DraggableRegionsChanged() {}
+  // Gestures -------------------------------------------------------------
 
   virtual bool CanHandleGestureEvent() { return false; }
 
   // TODO(lfg): These methods are only exposed through WebViewClient while we
   // refactor WebView to not inherit from WebWidget.
   // WebWidgetClient overrides.
   void CloseWidgetSoon() override {}
   void ConvertViewportToWindow(WebRect* rect) override {}
   void ConvertWindowToViewport(WebFloatRect* rect) override {}
   void DidHandleGestureEvent(const WebGestureEvent& event,
@@ skipping 11 matching lines @@
                                   bool page_changed) override {}
   void Show(WebNavigationPolicy) override {}
   virtual WebWidgetClient* WidgetClient() { return this; }
 
  protected:
 };
 
 }  // namespace blink
 
 #endif