Add MessageLoopProxy::current

base/threading/thread.h

Index: base/threading/thread.h
diff --git a/base/threading/thread.h b/base/threading/thread.h
index 58a4cc27b617935d5fd80a3eaf8b83d2f21ff034..d7451ec58ab9238db1b434c4944523a0180e2506 100644
--- a/base/threading/thread.h
+++ b/base/threading/thread.h
@@ -113,7 +113,7 @@ class BASE_EXPORT Thread : PlatformThread::Delegate {
   // is gone.
   // TODO(sanjeevr): Look into merging MessageLoop and MessageLoopProxy.
   scoped_refptr<MessageLoopProxy> message_loop_proxy() const {
-    return message_loop_proxy_;
+    return message_loop_->message_loop_proxy();
   }
 
   // Set the name of this thread (for display in debugger too).
@@ -175,10 +175,6 @@ class BASE_EXPORT Thread : PlatformThread::Delegate {
   // by the created thread.
   MessageLoop* message_loop_;
 
-  // A MessageLoopProxy implementation that targets this thread. This can
-  // outlive the thread.
-  scoped_refptr<MessageLoopProxy> message_loop_proxy_;
-
   // Our thread's ID.
   PlatformThreadId thread_id_;