Remove media::VideoDecodeContext as it has no implementation and is unused.

media/tools/player_wtl/movie.cc

 // Copyright (c) 2011 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/tools/player_wtl/movie.h"
 
 #include "base/memory/singleton.h"
 #include "base/threading/platform_thread.h"
 #include "base/utf_string_conversions.h"
 #include "media/base/filter_collection.h"
@@ skipping 57 matching lines @@
       message_loop_factory_->GetMessageLoop("PipelineThread");
   pipeline_ = new PipelineImpl(pipeline_loop, new media::MediaLog());
 
   // Create filter collection.
   scoped_ptr<FilterCollection> collection(new FilterCollection());
   collection->SetDemuxerFactory(new FFmpegDemuxerFactory(
       new FileDataSourceFactory(), pipeline_loop));
   collection->AddAudioDecoder(new FFmpegAudioDecoder(
       message_loop_factory_->GetMessageLoop("AudioDecoderThread")));
   collection->AddVideoDecoder(new FFmpegVideoDecoder(
-      message_loop_factory_->GetMessageLoop("VideoDecoderThread"), NULL));
+      message_loop_factory_->GetMessageLoop("VideoDecoderThread")));
 
   if (enable_audio_) {
     collection->AddAudioRenderer(new ReferenceAudioRenderer());
   } else {
     collection->AddAudioRenderer(new media::NullAudioRenderer());
   }
   collection->AddVideoRenderer(video_renderer);
 
   // Create and start our pipeline.
   media::PipelineStatusNotification note;
@@ skipping 84 matching lines @@
 void Movie::Close() {
   if (pipeline_) {
     pipeline_->Stop(media::PipelineStatusCB());
     pipeline_ = NULL;
   }
 
   message_loop_factory_.reset();
 }
 
 }  // namespace media