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

chrome/browser/extensions/api/tab_capture/tab_capture_apitest.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 "base/basictypes.h"
 #include "base/command_line.h"
 #include "base/location.h"
 #include "base/single_thread_task_runner.h"
 #include "base/strings/stringprintf.h"
 #include "base/thread_task_runner_handle.h"
@@ skipping 419 matching lines @@
 
     void TabChangedAt(content::WebContents* contents,
                       int index,
                       TabChangeType change_type) override {
       const TabMediaState media_state =
           chrome::GetTabMediaStateForContents(contents);
       const bool has_changed = media_state != last_media_state_;
       last_media_state_ = media_state;
       if (has_changed) {
         base::ThreadTaskRunnerHandle::Get()->PostTask(
-            FROM_HERE, base::MessageLoop::QuitClosure());
+            FROM_HERE, base::MessageLoop::QuitWhenIdleClosure());
       }
     }
 
    private:
     TabMediaState last_media_state_;
   };
 
   // Run the browser until the indicator turns on.
   IndicatorChangeObserver observer(browser());
   browser()->tab_strip_model()->AddObserver(&observer);
   const base::TimeTicks start_time = base::TimeTicks::Now();
   while (observer.last_media_state() != TAB_MEDIA_STATE_CAPTURING) {
     if (base::TimeTicks::Now() - start_time >
             base::TimeDelta::FromSeconds(10)) {
       EXPECT_EQ(TAB_MEDIA_STATE_CAPTURING, observer.last_media_state());
       browser()->tab_strip_model()->RemoveObserver(&observer);
       return;
     }
     content::RunMessageLoop();
   }
   browser()->tab_strip_model()->RemoveObserver(&observer);
 }
 
 }  // namespace
 
 }  // namespace extensions