Remove media::VideoDecodeContext as it has no implementation and is unused.

media/video/video_mock_objects.h

-// Copyright (c) 2011 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_MOCK_OBJECTS_H_
-#define MEDIA_VIDEO_MOCK_OBJECTS_H_
-
-#include "media/video/video_decode_context.h"
-#include "media/video/video_decode_engine.h"
-#include "testing/gmock/include/gmock/gmock.h"
-
-namespace media {
-
-class MockVideoDecodeEngine : public VideoDecodeEngine {
- public:
-  MockVideoDecodeEngine();
-  virtual ~MockVideoDecodeEngine();
-
-  MOCK_METHOD4(Initialize, void(MessageLoop* message_loop,
-                                EventHandler* event_handler,
-                                VideoDecodeContext* context,
-                                const VideoDecoderConfig& config));
-  MOCK_METHOD0(Uninitialize, void());
-  MOCK_METHOD0(Flush, void());
-  MOCK_METHOD0(Seek, void());
-  MOCK_METHOD1(ConsumeVideoSample, void(scoped_refptr<Buffer> buffer));
-  MOCK_METHOD1(ProduceVideoFrame, void(scoped_refptr<VideoFrame> frame));
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(MockVideoDecodeEngine);
-};
-
-class MockVideoDecodeContext : public VideoDecodeContext {
- public:
-  MockVideoDecodeContext();
-  virtual ~MockVideoDecodeContext();
-
-  MOCK_METHOD0(GetDevice, void*());
-  MOCK_METHOD6(AllocateVideoFrames, void(
-      int n, size_t width, size_t height, VideoFrame::Format format,
-      std::vector<scoped_refptr<VideoFrame> >* frames,
-      Task* task));
-  MOCK_METHOD0(ReleaseAllVideoFrames, void());
-  MOCK_METHOD3(ConvertToVideoFrame,  void(
-      void* buffer, scoped_refptr<VideoFrame> frame, Task* task));
-  MOCK_METHOD1(Destroy, void(Task* task));
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(MockVideoDecodeContext);
-};
-
-}  // namespace media
-
-#endif  // MEDIA_VIDEO_MOCK_OBJECTS_H_