Refactor some code that depends on FFmpeg

media/ffmpeg/ffmpeg_common.h

Index: media/ffmpeg/ffmpeg_common.h
diff --git a/media/filters/ffmpeg_common.h b/media/ffmpeg/ffmpeg_common.h
similarity index 91%
rename from media/filters/ffmpeg_common.h
rename to media/ffmpeg/ffmpeg_common.h
index 19c8fcf7b91d919dd7ad65e1e94f67e26e3ec2c3..9be245ff1d418f1034c21ec33f3e57d1bdb431a3 100644
--- a/media/filters/ffmpeg_common.h
+++ b/media/ffmpeg/ffmpeg_common.h
@@ -1,9 +1,9 @@
-// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Copyright (c) 2010 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_FILTERS_FFMPEG_COMMON_H_
-#define MEDIA_FILTERS_FFMPEG_COMMON_H_
+#ifndef MEDIA_FFMPEG_FFMPEG_COMMON_H_
+#define MEDIA_FFMPEG_FFMPEG_COMMON_H_
 
 // Used for FFmpeg error codes.
 #include <cerrno>
@@ -79,4 +79,4 @@ extern const char kFFmpegVideo[];
 
 }  // namespace media
 
-#endif  // MEDIA_FILTERS_FFMPEG_COMMON_H_
+#endif  // MEDIA_FFMPEG_FFMPEG_COMMON_H_