Remove use of deprecated MessageLoop methods in remoting.

remoting/protocol/channel_multiplexer_unittest.cc

Index: remoting/protocol/channel_multiplexer_unittest.cc
diff --git a/remoting/protocol/channel_multiplexer_unittest.cc b/remoting/protocol/channel_multiplexer_unittest.cc
index 5e2efac18398ab713214260895e038352abce170..0cac0452110ba64f01cbbc446894bd21c71ab9ab 100644
--- a/remoting/protocol/channel_multiplexer_unittest.cc
+++ b/remoting/protocol/channel_multiplexer_unittest.cc
@@ -7,8 +7,11 @@
 #include <utility>
 
 #include "base/bind.h"
+#include "base/location.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
+#include "base/single_thread_task_runner.h"
+#include "base/threading/thread_task_runner_handle.h"
 #include "net/base/net_errors.h"
 #include "net/socket/socket.h"
 #include "net/socket/stream_socket.h"
@@ -36,7 +39,7 @@ const char kTestChannelName2[] = "test2";
 
 
 void QuitCurrentThread() {
-  base::MessageLoop::current()->PostTask(
+  base::ThreadTaskRunnerHandle::Get()->PostTask(
       FROM_HERE, base::MessageLoop::QuitWhenIdleClosure());
 }