Don't use base::MessageLoop::{Quit,QuitClosure} in chrome/

chrome/browser/printing/cloud_print/test/cloud_print_proxy_process_browsertest.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.
 
 // Create a service process that uses a Mock to respond to the browser in order
 // to test launching the browser using the cloud print policy check command
 // line switch.
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 346 matching lines @@
     void Wait() {
       if (seen_)
         return;
       running_ = true;
       content::RunMessageLoop();
     }
 
     void Notify() {
       seen_ = true;
       if (running_)
-        base::MessageLoopForUI::current()->Quit();
+        base::MessageLoopForUI::current()->QuitWhenIdle();
     }
 
    private:
     bool seen_;
     bool running_;
   };
 
   WindowedChannelConnectionObserver observer_;
 };
 
@@ skipping 133 matching lines @@
   // LocalState for the BrowserProcess.  Must be created before profiles are
   // constructed.
   chrome::TestingIOThreadState testing_io_thread_state;
 
   base::Process process =
       Launch("CloudPrintMockService_StartEnabledWaitForQuit");
   WaitForConnect();
   ShutdownAndWaitForExitWithTimeout(process.Pass());
   content::RunAllPendingInMessageLoop();
 }