Fix CrOS FileManagerBrowserTest with scheduler enabled

content/public/test/mock_render_thread.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 "content/public/test/mock_render_thread.h"
 
 #include "base/message_loop/message_loop_proxy.h"
 #include "content/common/frame_messages.h"
 #include "content/common/view_messages.h"
 #include "content/public/renderer/render_process_observer.h"
@@ skipping 45 matching lines @@
     if (msg->routing_id() == MSG_ROUTING_CONTROL)
       OnControlMessageReceived(*msg);
     else
       OnMessageReceived(*msg);
   }
   delete msg;
   return true;
 }
 
 scoped_refptr<base::SingleThreadTaskRunner> MockRenderThread::GetTaskRunner() {
-  return scoped_refptr<base::MessageLoopProxy>();
+  return base::MessageLoopProxy::current();
 }
 
 IPC::SyncChannel* MockRenderThread::GetChannel() {
   return NULL;
 }
 
 std::string MockRenderThread::GetLocale() {
   return "en-US";
 }
 
@@ skipping 182 matching lines @@
 void MockRenderThread::OnDuplicateSection(
     base::SharedMemoryHandle renderer_handle,
     base::SharedMemoryHandle* browser_handle) {
   // We don't have to duplicate the input handles since RenderViewTest does not
   // separate a browser process from a renderer process.
   *browser_handle = renderer_handle;
 }
 #endif  // defined(OS_WIN)
 
 }  // namespace content