Remove reference counting from media::VideoDecoder and friends.

media/base/filter_collection.cc

Index: media/base/filter_collection.cc
diff --git a/media/base/filter_collection.cc b/media/base/filter_collection.cc
index ce861a59b33f9fa4d462918cdbca14d757457547..6bba99ec90ae16e7602c09fa03fc5bc97f59b790 100644
--- a/media/base/filter_collection.cc
+++ b/media/base/filter_collection.cc
@@ -7,7 +7,6 @@
 #include "base/logging.h"
 #include "media/base/audio_renderer.h"
 #include "media/base/demuxer.h"
-#include "media/base/video_decoder.h"
 #include "media/base/video_renderer.h"
 
 namespace media {
@@ -43,13 +42,8 @@ scoped_ptr<VideoRenderer> FilterCollection::GetVideoRenderer() {
 }
 
 void FilterCollection::Clear() {
-  video_decoders_.clear();
   audio_renderer_.reset();
   video_renderer_.reset();
 }
 
-FilterCollection::VideoDecoderList* FilterCollection::GetVideoDecoders() {
-  return &video_decoders_;
-}
-
 }  // namespace media