Moving MockFFmpeg to its own file and some media.gyp cleanup.

media/base/mock_ffmpeg.h

Index: media/base/mock_ffmpeg.h
diff --git a/media/base/mock_ffmpeg.h b/media/base/mock_ffmpeg.h
new file mode 100644
index 0000000000000000000000000000000000000000..62b085c0bb7bff304d3effa1be82970db4f2144f
--- /dev/null
+++ b/media/base/mock_ffmpeg.h
@@ -0,0 +1,34 @@
+// Copyright (c) 2009 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_BASE_MOCK_FFMPEG_H_
+#define MEDIA_BASE_MOCK_FFMPEG_H_
+
+#include "testing/gmock/include/gmock/gmock.h"
+
+struct AVCodec;
+struct AVCodecContext;
+struct AVFrame;
+struct AVPacket;
+enum CodecID;
+
+namespace media {
+
+class MockFFmpeg {
+ public:
+  MOCK_METHOD1(AVCodecFindDecoder, AVCodec*(enum CodecID id));
+  MOCK_METHOD2(AVCodecOpen, int(AVCodecContext* avctx, AVCodec* codec));
+  MOCK_METHOD2(AVCodecThreadInit, int(AVCodecContext* avctx, int threads));
+
+  // Setter/getter for the global instance of MockFFmpeg.
+  static void set(MockFFmpeg* instance);
+  static MockFFmpeg* get();
+
+ private:
+  static MockFFmpeg* instance_;
+};
+
+}  // namespace media
+
+#endif  // MEDIA_BASE_MOCK_FFMPEG_H_