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

chrome/browser/chromeos/login/lock/screen_locker_browsertest.cc

 // Copyright 2014 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 "chrome/browser/chromeos/login/lock/screen_locker.h"
 
 #include "ash/wm/window_state.h"
 #include "base/command_line.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 44 matching lines @@
   }
 
   ~Waiter() override {}
 
   void Observe(int type,
                const content::NotificationSource& source,
                const content::NotificationDetails& details) override {
     DCHECK(type == chrome::NOTIFICATION_SCREEN_LOCK_STATE_CHANGED ||
            type == chrome::NOTIFICATION_FULLSCREEN_CHANGED);
     if (running_)
-      base::MessageLoop::current()->Quit();
+      base::MessageLoop::current()->QuitWhenIdle();
   }
 
   // Wait until the two conditions are met.
   void Wait(bool locker_state, bool fullscreen) {
     running_ = true;
     scoped_ptr<chromeos::test::ScreenLockerTester>
         tester(chromeos::ScreenLocker::GetTester());
     while (tester->IsLocked() != locker_state ||
            browser_->window()->IsFullscreen() != fullscreen) {
       content::RunMessageLoop();
@@ skipping 235 matching lines @@
   EXPECT_EQ("", tester->GetPassword());
 
   // Close the locker to match expectations.
   ScreenLocker::Hide();
   content::RunAllPendingInMessageLoop();
   EXPECT_FALSE(tester->IsLocked());
   EXPECT_TRUE(VerifyLockScreenDismissed());
 }
 
 }  // namespace chromeos