Use enum instead of string in MessageLoopFactory::GetMessageLoop*

media/tools/player_wtl/movie.cc

 // 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.
 
 #include "media/tools/player_wtl/movie.h"
 
 #include "base/bind.h"
 #include "base/memory/singleton.h"
 #include "base/threading/platform_thread.h"
 #include "base/utf_string_conversions.h"
@@ skipping 42 matching lines @@
 
 bool Movie::Open(const wchar_t* url, VideoRendererBase* video_renderer) {
   // Close previous movie.
   if (pipeline_) {
     Close();
   }
 
   message_loop_factory_.reset(new media::MessageLoopFactory());
 
   MessageLoop* pipeline_loop =
-      message_loop_factory_->GetMessageLoop("PipelineThread");
+      message_loop_factory_->GetMessageLoop(
+          media::MessageLoopFactory::PIPELINE);
   pipeline_ = new Pipeline(pipeline_loop, new media::MediaLog());
 
   // Open the file.
   std::string url_utf8 = WideToUTF8(string16(url));
   scoped_refptr<FileDataSource> data_source = new FileDataSource();
   if (!data_source->Initialize(url_utf8)) {
     return false;
   }
 
   // Create filter collection.
   scoped_ptr<FilterCollection> collection(new FilterCollection());
   collection->SetDemuxer(new FFmpegDemuxer(pipeline_loop, data_source));
   collection->AddAudioDecoder(new FFmpegAudioDecoder(
       base::Bind(&MessageLoopFactory::GetMessageLoop,
                  base::Unretained(message_loop_factory_.get()),
-                 "AudioDecoderThread")));
+                 media::MessageLoopFactory::AUDIO_DECODER)));
   collection->AddVideoDecoder(new FFmpegVideoDecoder(
       base::Bind(&MessageLoopFactory::GetMessageLoop,
                  base::Unretained(message_loop_factory_.get()),
-                 "VideoDecoderThread"),
+                 media::MessageLoopFactory::VIDEO_DECODER),
       NULL));
 
   // TODO(vrk): Re-enabled audio. (crbug.com/112159)
   collection->AddAudioRenderer(
       new media::AudioRendererImpl(new media::NullAudioSink()));
   collection->AddVideoRenderer(video_renderer);
 
   // Create and start our pipeline.
   media::PipelineStatusNotification note;
   pipeline_->Start(
@@ skipping 86 matching lines @@
 void Movie::Close() {
   if (pipeline_) {
     pipeline_->Stop(base::Closure());
     pipeline_ = NULL;
   }
 
   message_loop_factory_.reset();
 }
 
 }  // namespace media