Switch DesktopEnvironment to return a DesktopCapturer.

remoting/host/fake_screen_capturer.h

-// Copyright 2013 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_FAKE_SCREEN_CAPTURER_H_
-#define REMOTING_HOST_FAKE_SCREEN_CAPTURER_H_
-
-#include "base/callback.h"
-#include "base/memory/scoped_ptr.h"
-#include "media/base/media_export.h"
-#include "third_party/webrtc/modules/desktop_capture/desktop_geometry.h"
-#include "third_party/webrtc/modules/desktop_capture/screen_capture_frame_queue.h"
-#include "third_party/webrtc/modules/desktop_capture/screen_capturer.h"
-
-namespace remoting {
-
-// A FakeScreenCapturer generates artificial image for testing purpose.
-//
-// FakeScreenCapturer is double-buffered as required by ScreenCapturer.
-class FakeScreenCapturer : public webrtc::ScreenCapturer {
- public:
-  // By default FakeScreenCapturer generates frames of size kWidth x kHeight,
-  // but custom frame generator set using set_frame_generator() may generate
-  // frames of different size.
-  static const int kWidth = 800;
-  static const int kHeight = 600;
-
-  typedef base::Callback<scoped_ptr<webrtc::DesktopFrame>(
-      webrtc::ScreenCapturer::Callback* callback)> FrameGenerator;
-
-  FakeScreenCapturer();
-  virtual ~FakeScreenCapturer();
-
-  void set_frame_generator(const FrameGenerator& frame_generator);
-
-  // webrtc::DesktopCapturer interface.
-  virtual void Start(Callback* callback) OVERRIDE;
-  virtual void Capture(const webrtc::DesktopRegion& rect) OVERRIDE;
-
-  // webrtc::ScreenCapturer interface.
-  virtual void SetMouseShapeObserver(
-      MouseShapeObserver* mouse_shape_observer) OVERRIDE;
-  virtual bool GetScreenList(ScreenList* screens) OVERRIDE;
-  virtual bool SelectScreen(webrtc::ScreenId id) OVERRIDE;
-
- private:
-  FrameGenerator frame_generator_;
-
-  Callback* callback_;
-  MouseShapeObserver* mouse_shape_observer_;
-
-  DISALLOW_COPY_AND_ASSIGN(FakeScreenCapturer);
-};
-
-}  // namespace remoting
-
-#endif  // REMOTING_HOST_FAKE_SCREEN_CAPTURER_H_