Simplify ScreenCapturer interface.

media/video/capture/screen/screen_capturer_fake.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 MEDIA_VIDEO_CAPTURE_SCREEN_SCREEN_CAPTURER_FAKE_H_
 #define MEDIA_VIDEO_CAPTURE_SCREEN_SCREEN_CAPTURER_FAKE_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "media/base/media_export.h"
 #include "media/video/capture/screen/screen_capturer.h"
 #include "media/video/capture/screen/screen_capturer_helper.h"
 
 namespace media {
 
 // A ScreenCapturerFake generates artificial image for testing purpose.
 //
 // ScreenCapturerFake is double-buffered as required by ScreenCapturer.
 class MEDIA_EXPORT ScreenCapturerFake : public ScreenCapturer {
  public:
   // ScreenCapturerFake generates a picture of size kWidth x kHeight.
   static const int kWidth = 800;
   static const int kHeight = 600;
 
   ScreenCapturerFake();
   virtual ~ScreenCapturerFake();
 
   // Overridden from ScreenCapturer:
   virtual void Start(Delegate* delegate) OVERRIDE;
-  virtual void Stop() OVERRIDE;
-  virtual void InvalidateRegion(const SkRegion& invalid_region) OVERRIDE;
   virtual void CaptureFrame() OVERRIDE;
 
  private:
   // Generates an image in the front buffer.
   void GenerateImage();
 
   // Called when the screen configuration is changed.
   void ScreenConfigurationChanged();
 
   Delegate* delegate_;
@@ skipping 19 matching lines @@
 
   // Used when |delegate_| does not implement CreateSharedBuffer().
   scoped_ptr<uint8[]> private_buffers_[kNumBuffers];
 
   DISALLOW_COPY_AND_ASSIGN(ScreenCapturerFake);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_VIDEO_CAPTURE_SCREEN_SCREEN_CAPTURER_FAKE_H_