Add MessageLoopProxy::current

base/threading/thread.cc

Index: base/threading/thread.cc
diff --git a/base/threading/thread.cc b/base/threading/thread.cc
index 7a100ca3610f1c29b7e0f1805e7ceef95361ea82..2ee7bd23258db826ab00d87b40695bad85bf9a58 100644
--- a/base/threading/thread.cc
+++ b/base/threading/thread.cc
@@ -151,7 +151,6 @@ void Thread::ThreadMain() {
     ANNOTATE_THREAD_NAME(name_.c_str());  // Tell the name to race detector.
     message_loop.set_thread_name(name_);
     message_loop_ = &message_loop;
-    message_loop_proxy_ = MessageLoopProxy::CreateForCurrentThread();
 
     // Let the thread do extra initialization.
     // Let's do this before signaling we are started.
@@ -171,7 +170,6 @@ void Thread::ThreadMain() {
 
     // We can't receive messages anymore.
     message_loop_ = NULL;
-    message_loop_proxy_ = NULL;
   }
   thread_id_ = kInvalidThreadId;
 }