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

chrome/browser/browsing_data/browsing_data_helper_browsertest.h

 // 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.
 
 // Contains code shared by all browsing data browsertests.
 
 #ifndef CHROME_BROWSER_BROWSING_DATA_BROWSING_DATA_HELPER_BROWSERTEST_H_
 #define CHROME_BROWSER_BROWSING_DATA_BROWSING_DATA_HELPER_BROWSERTEST_H_
 
 #include <list>
@@ skipping 12 matching lines @@
 
   const std::list<T>& result() {
     base::MessageLoop::current()->Run();
     DCHECK(has_result_);
     return result_;
   }
 
   void callback(const std::list<T>& info) {
     result_ = info;
     has_result_ = true;
-    base::MessageLoop::current()->Quit();
+    base::MessageLoop::current()->QuitWhenIdle();
   }
 
  private:
   bool has_result_ = false;
   std::list<T> result_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowsingDataHelperCallback);
 };
 
 #endif  // CHROME_BROWSER_BROWSING_DATA_BROWSING_DATA_HELPER_BROWSERTEST_H_