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

content/renderer/render_view_impl.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_RENDERER_RENDER_VIEW_IMPL_H_
 #define CONTENT_RENDERER_RENDER_VIEW_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 312 matching lines @@
 #endif
   blink::WebString AcceptLanguages() override;
   void NavigateBackForwardSoon(int offset) override;
   int HistoryBackListCount() override;
   int HistoryForwardListCount() override;
   blink::WebSpeechRecognizer* SpeechRecognizer() override;
   void ZoomLimitsChanged(double minimum_level, double maximum_level) override;
   void PageScaleFactorChanged() override;
   virtual double zoomLevelToZoomFactor(double zoom_level) const;
   virtual double zoomFactorToZoomLevel(double factor) const;
-  void DraggableRegionsChanged() override;
   void PageImportanceSignalsChanged() override;
   void DidAutoResize(const blink::WebSize& newSize) override;
   blink::WebRect RootWindowRect() override;
   void DidFocus() override;
 
 #if defined(OS_ANDROID)
   // Only used on Android since all other platforms implement
   // date and time input fields using MULTIPLE_FIELDS_UI
   bool OpenDateTimeChooser(const blink::WebDateTimeChooserParams&,
                            blink::WebDateTimeChooserCompletion*) override;
@@ skipping 482 matching lines @@
   // ---------------------------------------------------------------------------
 
   base::WeakPtrFactory<RenderViewImpl> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderViewImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_VIEW_IMPL_H_