Refactor some code that depends on FFmpeg

media/ffmpeg/ffmpeg_util.cc

-// 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.
+// 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.
 
 #include "media/ffmpeg/ffmpeg_util.h"
 
-#include "media/filters/ffmpeg_common.h"
+#include "media/ffmpeg/ffmpeg_common.h"
 
 namespace media {
 
 static const AVRational kMicrosBase = { 1, base::Time::kMicrosecondsPerSecond };
 
 base::TimeDelta ConvertTimestamp(const AVRational& time_base, int64 timestamp) {
   int64 microseconds = av_rescale_q(timestamp, time_base, kMicrosBase);
   return base::TimeDelta::FromMicroseconds(microseconds);
 }
 
 }  // namespace media