Use SingleThreadTaskRunner instead of MessageLoopProxy in remoting/host.

remoting/host/screen_recorder_unittest.cc

 // Copyright (c) 2012 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 "remoting/host/screen_recorder.h"
 
 #include "base/bind.h"
 #include "base/message_loop.h"
 #include "remoting/base/base_mock_objects.h"
 #include "remoting/host/host_mock_objects.h"
@@ skipping 68 matching lines @@
     session_ = new MockSession();
     EXPECT_CALL(*session_, SetStateChangeCallback(_));
     EXPECT_CALL(*session_, SetRouteChangeCallback(_));
     EXPECT_CALL(*session_, Close())
         .Times(AnyNumber());
     connection_.reset(new MockConnectionToClient(
         session_, &host_stub_, &event_executor_));
     connection_->SetEventHandler(&handler_);
 
     record_ = new ScreenRecorder(
-        &message_loop_, &message_loop_,
-        base::MessageLoopProxy::current(),
-        &capturer_, encoder_);
+        message_loop_.message_loop_proxy(), message_loop_.message_loop_proxy(),
+        message_loop_.message_loop_proxy(), &capturer_, encoder_);
   }
 
   virtual void TearDown() OVERRIDE {
     connection_.reset();
     // Run message loop before destroying because protocol::Session is
     // destroyed asynchronously.
     message_loop_.RunAllPending();
   }
 
  protected:
@@ skipping 69 matching lines @@
   message_loop_.Run();
 }
 
 TEST_F(ScreenRecorderTest, StopWithoutStart) {
   EXPECT_CALL(capturer_, Stop());
   record_->Stop(base::Bind(&QuitMessageLoop, &message_loop_));
   message_loop_.Run();
 }
 
 }  // namespace remoting