redesign and reimplement proxy config service and tracker, revise proxy ui on cros

chrome/browser/net/proxy_service_factory.h

 // Copyright (c) 2011 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_PROXY_SERVICE_FACTORY_H_
 #define CHROME_BROWSER_NET_PROXY_SERVICE_FACTORY_H_
 #pragma once
 
 #include "base/basictypes.h"
 
+class ChromeProxyConfigService;
 class CommandLine;
-class PrefProxyConfigTracker;
+class PrefProxyConfigTrackerImpl;
+class PrefService;
+
+#if defined(OS_CHROMEOS)
+namespace chromeos {
+class ProxyConfigServiceImpl;
+}
+#endif  // defined(OS_CHROMEOS)
 
 namespace net {
 class NetLog;
 class ProxyConfigService;
 class ProxyService;
 class URLRequestContext;
 }  // namespace net
 
 class ProxyServiceFactory {
  public:
   // Creates a ProxyConfigService that delivers the system preferences
   // (or the respective ChromeOS equivalent).
-  static net::ProxyConfigService* CreateProxyConfigService(
-      PrefProxyConfigTracker* proxy_config_tracker);
+  static ChromeProxyConfigService* CreateProxyConfigService();
+
+#if defined(OS_CHROMEOS)
+  static chromeos::ProxyConfigServiceImpl* CreatePrefProxyConfigTracker(
+      PrefService* pref_service);
+#else
+  static PrefProxyConfigTrackerImpl* CreatePrefProxyConfigTracker(
+      PrefService* pref_service);
+#endif  // defined(OS_CHROMEOS)
 
   // Create a proxy service according to the options on command line.
   static net::ProxyService* CreateProxyService(
       net::NetLog* net_log,
       net::URLRequestContext* context,
       net::ProxyConfigService* proxy_config_service,
       const CommandLine& command_line);
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(ProxyServiceFactory);
 };
 
 #endif  // CHROME_BROWSER_NET_PROXY_SERVICE_FACTORY_H_