Reland: Remove reference counting from media::VideoDecoder and friends.

webkit/media/filter_helpers.h

-// Copyright (c) 2012 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 WEBKIT_MEDIA_FILTER_HELPERS_H_
-#define WEBKIT_MEDIA_FILTER_HELPERS_H_
-
-#include "base/basictypes.h"
-#include "base/memory/ref_counted.h"
-#include "base/memory/scoped_vector.h"
-// TODO(fgalligan): Remove the dependency on FFmpeg.
-#include "media/filters/ffmpeg_demuxer.h"
-
-namespace base {
-class MessageLoopProxy;
-}
-
-namespace media {
-class AudioDecoder;
-class ChunkDemuxer;
-class DataSource;
-class FilterCollection;
-}
-
-namespace webkit_media {
-
-// Creates and adds the default set of audio decoders to |audio_decoders|.
-void AddDefaultAudioDecoders(
-    const scoped_refptr<base::MessageLoopProxy>& message_loop,
-    ScopedVector<media::AudioDecoder>* audio_decoders);
-
-// Builds the required filters for handling media source URLs, adds them to
-// |filter_collection|.
-void BuildMediaSourceCollection(
-    const scoped_refptr<media::ChunkDemuxer>& demuxer,
-    const scoped_refptr<base::MessageLoopProxy>& message_loop,
-    media::FilterCollection* filter_collection);
-
-// Builds the required filters for handling regular URLs and adds them to
-// |filter_collection| and fills |video_decoder| returning true if successful.
-void BuildDefaultCollection(
-    const scoped_refptr<media::DataSource>& data_source,
-    const scoped_refptr<base::MessageLoopProxy>& message_loop,
-    media::FilterCollection* filter_collection,
-    const media::FFmpegNeedKeyCB& need_key_cb);
-
-}  // webkit_media
-
-#endif  // WEBKIT_MEDIA_FILTER_HELPERS_H_