add MessageLoopProxy in MessageLoopFactory

media/base/message_loop_factory_impl.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/base/message_loop_factory_impl.h"
 
 namespace media {
 
 MessageLoopFactoryImpl::MessageLoopFactoryImpl() {}
 
@@ skipping 30 matching lines @@
   if (thread->Start()) {
     MessageLoop* message_loop = thread->message_loop();
     thread_map_[name] = thread.release();
     return message_loop;
   }
 
   LOG(ERROR) << "Failed to start '" << name << "' thread!";
   return NULL;
 }
 
+scoped_refptr<base::MessageLoopProxy>
+MessageLoopFactoryImpl::GetMessageLoopProxy(const std::string& name) {
+  if (name.empty()) {
+    return NULL;
+  }
+
+  base::AutoLock auto_lock(lock_);
+
+  ThreadMap::iterator it = thread_map_.find(name);
+  if (it != thread_map_.end())
+    return (*it).second->message_loop_proxy();
+
+  scoped_ptr<base::Thread> thread(new base::Thread(name.c_str()));
+
+  if (thread->Start()) {
+    scoped_refptr<base::MessageLoopProxy> message_loop_proxy =
+        thread->message_loop_proxy();
+    thread_map_[name] = thread.release();
+    return message_loop_proxy;
+  }
+
+  LOG(ERROR) << "Failed to start '" << name << "' thread!";
+  return NULL;
+}
+
 }  // namespace media