Introduce RenderView::Observer interface so that RenderView doesn't have to k...

chrome/renderer/speech_input_dispatcher.h

 // Copyright (c) 2010 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 CHROME_RENDERER_SPEECH_INPUT_DISPATCHER_H_
 #define CHROME_RENDERER_SPEECH_INPUT_DISPATCHER_H_
 
 #include "base/basictypes.h"
 #include "chrome/common/speech_input_result.h"
-#include "ipc/ipc_channel.h"
+#include "chrome/renderer/render_view_observer.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebSpeechInputController.h"
 
 class GURL;
-class RenderView;
 
 namespace WebKit {
 class WebSpeechInputListener;
-class WebString;
-struct WebRect;
 }
 
 // SpeechInputDispatcher is a delegate for speech input messages used by WebKit.
 // It's the complement of SpeechInputDispatcherHost (owned by RenderViewHost).
-class SpeechInputDispatcher : public WebKit::WebSpeechInputController,
-                              public IPC::Channel::Listener {
+class SpeechInputDispatcher : public RenderViewObserver,
+                              public WebKit::WebSpeechInputController {
  public:
   SpeechInputDispatcher(RenderView* render_view,
                         WebKit::WebSpeechInputListener* listener);
 
-  // IPC::Channel::Listener implementation.
-  bool OnMessageReceived(const IPC::Message& msg);
+ private:
+  // RenderView::Observer implementation.
+  bool OnMessageReceived(const IPC::Message& message);
 
   // WebKit::WebSpeechInputController.
   virtual bool startRecognition(int request_id,
                                 const WebKit::WebRect& element_rect,
                                 const WebKit::WebString& language,
                                 const WebKit::WebString& grammar);
 
   virtual void cancelRecognition(int request_id);
   virtual void stopRecording(int request_id);
 
- private:
   void OnSpeechRecognitionResult(
       int request_id, const speech_input::SpeechInputResultArray& result);
   void OnSpeechRecordingComplete(int request_id);
   void OnSpeechRecognitionComplete(int request_id);
 
-  RenderView* render_view_;
   WebKit::WebSpeechInputListener* listener_;
 
   DISALLOW_COPY_AND_ASSIGN(SpeechInputDispatcher);
 };
 
 #endif  // CHROME_RENDERER_SPEECH_INPUT_DISPATCHER_H_