Combine audio decoding and video decoding onto a single thread.

media/base/message_loop_factory.cc

Index: media/base/message_loop_factory.cc
diff --git a/media/base/message_loop_factory.cc b/media/base/message_loop_factory.cc
index 04a904a57a86089e531c4b1ef7bb2d9156c87962..da6cac66cc02d368f27d4cf031ce81286a58374e 100644
--- a/media/base/message_loop_factory.cc
+++ b/media/base/message_loop_factory.cc
@@ -34,14 +34,11 @@ base::Thread* MessageLoopFactory::GetThread(Type type) {
 
   const char* name = NULL;
   switch (type) {
-    case kAudioDecoder:
-      name = "AudioDecoderThread";
-      break;
-    case kVideoDecoder:
-      name = "VideoDecoderThread";
+    case kDecoder:
+      name = "MediaDecoder";
       break;
     case kPipeline:
-      name = "PipelineThread";
+      name = "MediaPipeline";
       break;
   }