Add ZoomLevelChanged and DidChangeScrollOffset to RenderViewObserver

content/public/renderer/render_view_observer.h

 // Copyright (c) 2011 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_PUBLIC_RENDERER_RENDER_VIEW_OBSERVER_H_
 #define CONTENT_PUBLIC_RENDERER_RENDER_VIEW_OBSERVER_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "content/common/content_export.h"
 #include "ipc/ipc_channel.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebIconURL.h"
 
 namespace WebKit {
 class WebDataSource;
 class WebFrame;
 class WebFormElement;
 class WebMediaPlayerClient;
 class WebMouseEvent;
+class WebMouseWheelEvent;
 class WebNode;
 class WebTouchEvent;
 class WebURL;
 struct WebURLError;
 }
 
 namespace content {
 
 class RenderView;
 
@@ skipping 35 matching lines @@
   virtual void DidCreateDataSource(WebKit::WebFrame* frame,
                                    WebKit::WebDataSource* ds) {}
   virtual void PrintPage(WebKit::WebFrame* frame) {}
   virtual void FocusedNodeChanged(const WebKit::WebNode& node) {}
   virtual void WillCreateMediaPlayer(WebKit::WebFrame* frame,
                                      WebKit::WebMediaPlayerClient* client) {}
 
   // These match the RenderView methods.
   virtual void DidHandleMouseEvent(const WebKit::WebMouseEvent& event) {}
   virtual void DidHandleTouchEvent(const WebKit::WebTouchEvent& event) {}
+  virtual void DidHandleWheelEvent(const WebKit::WebMouseWheelEvent& event) {}
 
   // These match incoming IPCs.
   virtual void ContextMenuAction(unsigned id) {}
   virtual void Navigate(const GURL& url) {}
   virtual void ClosePage() {}
 
   // IPC::Channel::Listener implementation.
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
 
   // This is called by the RenderView when it's going away so that this object
@@ skipping 14 matching lines @@
   RenderView* render_view_;
   // The routing ID of the associated RenderView.
   int routing_id_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderViewObserver);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_RENDERER_RENDER_VIEW_OBSERVER_H_