Simplify ScreenCapturer interface.

remoting/host/ipc_video_frame_capturer.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 REMOTING_HOST_IPC_VIDEO_FRAME_CAPTURER_H_
 #define REMOTING_HOST_IPC_VIDEO_FRAME_CAPTURER_H_
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "media/video/capture/screen/screen_capturer.h"
@@ skipping 13 matching lines @@
 // Routes media::ScreenCapturer calls though the IPC channel to the desktop
 // session agent running in the desktop integration process.
 class IpcVideoFrameCapturer : public media::ScreenCapturer {
  public:
   explicit IpcVideoFrameCapturer(
       scoped_refptr<DesktopSessionProxy> desktop_session_proxy);
   virtual ~IpcVideoFrameCapturer();
 
   // media::ScreenCapturer interface.
   virtual void Start(Delegate* delegate) OVERRIDE;
-  virtual void Stop() OVERRIDE;
-  virtual void InvalidateRegion(const SkRegion& invalid_region) OVERRIDE;
   virtual void CaptureFrame() OVERRIDE;
 
   // Called when a video frame has been captured. |capture_data| describes
   // a captured frame.
   void OnCaptureCompleted(scoped_refptr<media::ScreenCaptureData> capture_data);
 
   // Called when the cursor shape has changed.
   void OnCursorShapeChanged(scoped_ptr<media::MouseCursorShape> cursor_shape);
 
  private:
   // Points to the delegate passed to media::ScreenCapturer::Start().
   media::ScreenCapturer::Delegate* delegate_;
 
   // Wraps the IPC channel to the desktop session agent.
   scoped_refptr<DesktopSessionProxy> desktop_session_proxy_;
 
   // Used to cancel tasks pending on the capturer when it is stopped.
   base::WeakPtrFactory<IpcVideoFrameCapturer> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(IpcVideoFrameCapturer);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_HOST_IPC_VIDEO_FRAME_CAPTURER_H_