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

chrome/browser/net/predictor_browsertest.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 <stdint.h>
 
 #include "base/base64.h"
 #include "base/command_line.h"
 #include "base/json/json_string_value_serializer.h"
 #include "base/macros.h"
@@ skipping 163 matching lines @@
 
  private:
   ~HostResolutionRequestRecorder() override {}
 
   void AddToHistory(const std::string& hostname) {
     DCHECK_CURRENTLY_ON(BrowserThread::UI);
     requested_hostnames_.push_back(hostname);
     if (is_waiting_for_hostname_ && waiting_for_hostname_ == hostname) {
       is_waiting_for_hostname_ = false;
       waiting_for_hostname_.clear();
-      base::MessageLoop::current()->Quit();
+      base::MessageLoop::current()->QuitWhenIdle();
     }
   }
 
   // The hostname which WaitUntilHostHasBeenRequested is currently waiting for
   // to be requested.
   std::string waiting_for_hostname_;
 
   // Whether WaitUntilHostHasBeenRequested is waiting for a hostname to be
   // requested and thus is running a nested message loop.
   bool is_waiting_for_hostname_;
@@ skipping 259 matching lines @@
   // Second navigation to content with an img.
   std::string img_content =
       "<img src=\"" + preconnect_url.spec() + "test.gif\">";
   NavigateToDataURLWithContent(img_content);
   connection_listener_->WaitUntilFirstConnectionRead();
   EXPECT_EQ(2u, connection_listener_->GetAcceptedSocketCount());
   EXPECT_EQ(1u, connection_listener_->GetReadSocketCount());
 }
 
 }  // namespace chrome_browser_net