Fixed minor atomicity issue in PrefProxyConfigService::GetLatestProxyConfig.

chrome/browser/net/chrome_url_request_context.h

 // Copyright (c) 2010 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.
 
 #ifndef CHROME_BROWSER_NET_CHROME_URL_REQUEST_CONTEXT_H_
 #define CHROME_BROWSER_NET_CHROME_URL_REQUEST_CONTEXT_H_
 #pragma once
 
 #include <string>
 #include <vector>
@@ skipping 17 matching lines @@
 #include "net/url_request/url_request_context.h"
 #include "webkit/database/database_tracker.h"
 
 class CommandLine;
 class PrefService;
 class Profile;
 
 namespace net {
 class DnsCertProvenanceChecker;
 class NetworkDelegate;
-class ProxyConfig;
 }
 
 class ChromeURLRequestContext;
 class ChromeURLRequestContextFactory;
 
 // Subclass of URLRequestContext which can be used to store extra information
 // for requests.
 //
 // All methods of this class must be called from the IO thread,
 // including the constructor and destructor.
@@ skipping 333 matching lines @@
 
   FilePath profile_dir_path_;
 
  private:
   IOThread* const io_thread_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeURLRequestContextFactory);
 };
 
 #endif  // CHROME_BROWSER_NET_CHROME_URL_REQUEST_CONTEXT_H_