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

chrome/browser/chromeos/proxy_config_service.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_CHROMEOS_PROXY_CONFIG_SERVICE_H_
-#define CHROME_BROWSER_CHROMEOS_PROXY_CONFIG_SERVICE_H_
-#pragma once
-
-#include "chrome/browser/chromeos/proxy_config_service_impl.h"
-
-namespace chromeos {
-
-// Wrapper class for the RefCountedThreadSafe chromeos::ProxyConfigServiceImpl
-// that forwards net::ProxyConfigService interface to the actual implementation,
-// instantiated in ProfileIOData::CreateProxyConfigService.
-class ProxyConfigService : public net::ProxyConfigService {
- public:
-  explicit ProxyConfigService(
-      const scoped_refptr<ProxyConfigServiceImpl>& impl);
-  virtual ~ProxyConfigService();
-
-  // ProxyConfigService methods.  Called from IO thread.
-  virtual void AddObserver(Observer* observer);
-  virtual void RemoveObserver(Observer* observer);
-  virtual ConfigAvailability GetLatestProxyConfig(net::ProxyConfig* config);
-
- private:
-  scoped_refptr<ProxyConfigServiceImpl> impl_;
-
-  DISALLOW_COPY_AND_ASSIGN(ProxyConfigService);
-};
-
-}  // namespace chromeos
-
-#endif  // CHROME_BROWSER_CHROMEOS_PROXY_CONFIG_SERVICE_H_