Remove dead code for GtkVideoRenderer.

webrtc/media/devices/gtkvideorenderer.h

-/*
- *  Copyright (c) 2004 The WebRTC project authors. All Rights Reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-// Definition of class GtkVideoRenderer that implements the abstract class
-// cricket::VideoRenderer via GTK.
-
-#ifndef WEBRTC_MEDIA_DEVICES_GTKVIDEORENDERER_H_
-#define WEBRTC_MEDIA_DEVICES_GTKVIDEORENDERER_H_
-
-#include <stdint.h>
-
-#include <memory>
-
-#include "webrtc/media/base/videosinkinterface.h"
-
-typedef struct _GtkWidget GtkWidget;  // forward declaration, defined in gtk.h
-namespace webrtc {
-class VideoFrame;
-}
-
-namespace cricket {
-
-class GtkVideoRenderer : public rtc::VideoSinkInterface<webrtc::VideoFrame> {
- public:
-  GtkVideoRenderer(int x, int y);
-  virtual ~GtkVideoRenderer();
-
-  // Implementation of VideoSinkInterface.
-  void OnFrame(const webrtc::VideoFrame& frame) override;
-
- private:
-  bool SetSize(int width, int height);
-  // Initialize the attributes when the first frame arrives.
-  bool Initialize(int width, int height);
-  // Pump the Gtk event loop until there are no events left.
-  void Pump();
-  // Check if the window has been closed.
-  bool IsClosed() const;
-
-  std::unique_ptr<uint8_t[]> image_;
-  GtkWidget* window_;
-  GtkWidget* draw_area_;
-  // The initial position of the window.
-  int initial_x_;
-  int initial_y_;
-
-  int width_;
-  int height_;
-};
-
-}  // namespace cricket
-
-#endif  // WEBRTC_MEDIA_DEVICES_GTKVIDEORENDERER_H_