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

chrome/browser/importer/firefox_importer_browsertest.cc

 // Copyright (c) 2013 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/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/message_loop/message_loop.h"
 #include "base/path_service.h"
 #include "base/stl_util.h"
@@ skipping 126 matching lines @@
         history_count_(0),
         password_count_(0),
         keyword_count_(0),
         use_keyword_in_json_(use_keyword_in_json) {}
 
   // importer::ImporterProgressObserver:
   void ImportStarted() override {}
   void ImportItemStarted(importer::ImportItem item) override {}
   void ImportItemEnded(importer::ImportItem item) override {}
   void ImportEnded() override {
-    base::MessageLoop::current()->Quit();
+    base::MessageLoop::current()->QuitWhenIdle();
     EXPECT_EQ(arraysize(kFirefoxBookmarks), bookmark_count_);
     EXPECT_EQ(1U, history_count_);
     EXPECT_EQ(arraysize(kFirefoxPasswords), password_count_);
     // The following test case from |kFirefoxKeywords| won't be imported:
     //   "http://%x.example.{searchTerms}.com/"}.
     // Hence, value of |keyword_count_| should be lower than size of
     // |kFirefoxKeywords| by 1.
     EXPECT_EQ(arraysize(kFirefoxKeywords) - 1, keyword_count_);
   }
 
@@ skipping 192 matching lines @@
   scoped_refptr<FirefoxObserver> observer(new FirefoxObserver(true));
   FirefoxImporterBrowserTest("firefox_profile", observer.get(), observer.get());
 }
 
 IN_PROC_BROWSER_TEST_F(FirefoxProfileImporterBrowserTest,
                        MAYBE_IMPORTER(Firefox320Importer)) {
   scoped_refptr<FirefoxObserver> observer(new FirefoxObserver(true));
   FirefoxImporterBrowserTest("firefox320_profile", observer.get(),
                              observer.get());
 }