Use enum instead of string in MessageLoopFactory::GetMessageLoop*

webkit/media/filter_helpers.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 "webkit/media/filter_helpers.h"
 
 #include "base/bind.h"
 #include "media/base/filter_collection.h"
 #include "media/base/message_loop_factory.h"
 #include "media/filters/chunk_demuxer.h"
 #include "media/filters/dummy_demuxer.h"
 #include "media/filters/ffmpeg_audio_decoder.h"
 #include "media/filters/ffmpeg_demuxer.h"
 #include "media/filters/ffmpeg_video_decoder.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebURL.h"
 #include "webkit/media/media_stream_client.h"
 
 namespace webkit_media {
 
 // Constructs and adds the default audio/video decoders to |filter_collection|.
 static void AddDefaultDecodersToCollection(
     media::MessageLoopFactory* message_loop_factory,
     media::FilterCollection* filter_collection,
     media::Decryptor* decryptor) {
   filter_collection->AddAudioDecoder(new media::FFmpegAudioDecoder(
       base::Bind(&media::MessageLoopFactory::GetMessageLoop,
                  base::Unretained(message_loop_factory),
-                 "AudioDecoderThread")));
+                 media::MessageLoopFactory::kAudioDecoder)));
 
   scoped_refptr<media::FFmpegVideoDecoder> ffmpeg_video_decoder =
       new media::FFmpegVideoDecoder(
           base::Bind(&media::MessageLoopFactory::GetMessageLoop,
                      base::Unretained(message_loop_factory),
-                     "VideoDecoderThread"),
+                     media::MessageLoopFactory::kVideoDecoder),
           decryptor);
   filter_collection->AddVideoDecoder(ffmpeg_video_decoder);
 }
 
 bool BuildMediaStreamCollection(const WebKit::WebURL& url,
                                 MediaStreamClient* client,
                                 media::MessageLoopFactory* message_loop_factory,
                                 media::FilterCollection* filter_collection) {
   if (!client)
     return false;
@@ skipping 35 matching lines @@
                                  decryptor);
   return true;
 }
 
 void BuildDefaultCollection(
     const scoped_refptr<media::DataSource>& data_source,
     media::MessageLoopFactory* message_loop_factory,
     media::FilterCollection* filter_collection,
     media::Decryptor* decryptor) {
   filter_collection->SetDemuxer(new media::FFmpegDemuxer(
-      message_loop_factory->GetMessageLoop("PipelineThread"),
+      message_loop_factory->GetMessageLoop(
+          media::MessageLoopFactory::kPipeline),
       data_source));
 
   AddDefaultDecodersToCollection(message_loop_factory, filter_collection,
                                  decryptor);
 }
 
 }  // webkit_media