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

chrome/browser/ui/search/instant_extended_interactive_uitest.cc

 // Copyright 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 <sstream>
 
 #include "base/base_switches.h"
 #include "base/command_line.h"
 #include "base/metrics/histogram_base.h"
 #include "base/metrics/histogram_samples.h"
@@ skipping 77 matching lines @@
 // for use with BlockUntilHistoryProcessesPendingRequests.
 class QuittingHistoryDBTask : public history::HistoryDBTask {
  public:
   QuittingHistoryDBTask() {}
 
   bool RunOnDBThread(history::HistoryBackend* backend,
                      history::HistoryDatabase* db) override {
     return true;
   }
 
-  void DoneRunOnMainThread() override { base::MessageLoop::current()->Quit(); }
+  void DoneRunOnMainThread() override {
+    base::MessageLoop::current()->QuitWhenIdle();
+  }
 
  private:
   ~QuittingHistoryDBTask() override {}
 
   DISALLOW_COPY_AND_ASSIGN(QuittingHistoryDBTask);
 };
 
 class FakeNetworkChangeNotifier : public net::NetworkChangeNotifier {
  public:
   FakeNetworkChangeNotifier() : connection_type_(CONNECTION_NONE) {}
@@ skipping 894 matching lines @@
   stream << "link.href = \"" << result_url.spec() << "\";";
   stream << "document.body.appendChild(link);";
   stream << "link.click();";
   EXPECT_TRUE(content::ExecuteScript(contents, stream.str()));
 
   content::WaitForLoadStop(contents);
   std::string expected_title =
       "Referrer is " + instant_url().GetWithEmptyPath().spec();
   EXPECT_EQ(ASCIIToUTF16(expected_title), contents->GetTitle());
 }