[mojo] Replace MessageLoopProxy usage with ThreadTaskRunnerHandle

mojo/common/handle_watcher.cc

Index: mojo/common/handle_watcher.cc
diff --git a/mojo/common/handle_watcher.cc b/mojo/common/handle_watcher.cc
index 79cdcdb616b7e8cc5c1b69603b945b52f06ced65..747e178f729ca0f6788908e1817912dbd6a450fa 100644
--- a/mojo/common/handle_watcher.cc
+++ b/mojo/common/handle_watcher.cc
@@ -14,9 +14,10 @@
 #include "base/memory/singleton.h"
 #include "base/memory/weak_ptr.h"
 #include "base/message_loop/message_loop.h"
-#include "base/message_loop/message_loop_proxy.h"
+#include "base/single_thread_task_runner.h"
 #include "base/synchronization/lock.h"
 #include "base/synchronization/waitable_event.h"
+#include "base/thread_task_runner_handle.h"
 #include "base/threading/thread.h"
 #include "base/threading/thread_restrictions.h"
 #include "base/time/time.h"
@@ -50,7 +51,7 @@ struct WatchData {
   MojoHandleSignals handle_signals;
   base::TimeTicks deadline;
   base::Callback<void(MojoResult)> callback;
-  scoped_refptr<base::MessageLoopProxy> message_loop;
+  scoped_refptr<base::SingleThreadTaskRunner> message_loop;

[sky, 2015/05/01 15:21:53]

Rename this.

[anujsharma, 2015/05/04 06:56:39]

Done.

 };
 
 // WatcherBackend --------------------------------------------------------------
@@ -238,8 +239,8 @@ WatcherID WatcherThreadManager::StartWatching(
   request_data.start_data.callback = callback;
   request_data.start_data.handle_signals = handle_signals;
   request_data.start_data.deadline = deadline;
-  request_data.start_data.message_loop = base::MessageLoopProxy::current();
-  DCHECK_NE(static_cast<base::MessageLoopProxy*>(NULL),
+  request_data.start_data.message_loop = base::ThreadTaskRunnerHandle::Get();
+  DCHECK_NE(static_cast<base::SingleThreadTaskRunner*>(NULL),
             request_data.start_data.message_loop.get());
   AddRequest(request_data);
   return request_data.start_data.id;