Extended: Add "system" URLRequestContext

chrome/browser/net/pref_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_NET_PREF_PROXY_CONFIG_SERVICE_H_
 #define CHROME_BROWSER_NET_PREF_PROXY_CONFIG_SERVICE_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "base/observer_list.h"
@@ skipping 15 matching lines @@
  public:
   // Observer interface used to send out notifications on the IO thread about
   // changes to the proxy configuration.
   class Observer {
    public:
     virtual ~Observer() {}
     virtual void OnPrefProxyConfigChanged() = 0;
   };
 
   explicit PrefProxyConfigTracker(PrefService* pref_service);
-  virtual ~PrefProxyConfigTracker();
 
   // Observer manipulation is only valid on the IO thread.
   void AddObserver(Observer* observer);
   void RemoveObserver(Observer* observer);
 
   // Get the proxy configuration currently defined by preferences. Writes the
   // configuration to |config| and returns true on success. |config| is not
   // touched and false is returned if there is no configuration defined. This
   // must be called on the IO thread.
   bool GetProxyConfig(net::ProxyConfig* config);
 
   // Notifies the tracker that the pref service passed upon construction is
   // about to go away. This must be called from the UI thread.
   void DetachFromPrefService();
 
  private:
+  friend class base::RefCountedThreadSafe<PrefProxyConfigTracker>;
+  virtual ~PrefProxyConfigTracker();
+
   // NotificationObserver implementation:
   virtual void Observe(NotificationType type,
                        const NotificationSource& source,
                        const NotificationDetails& details);
 
   // Install a new configuration. This is invoked on the IO thread to update
   // the internal state after handling a pref change on the UI thread. |valid|
   // indicates whether there is a preference proxy configuration defined, in
   // which case this configuration is given by |config|. |config| is ignored if
   // |valid| is false.
@@ skipping 57 matching lines @@
   ObserverList<net::ProxyConfigService::Observer, true> observers_;
   scoped_refptr<PrefProxyConfigTracker> pref_config_tracker_;
 
   // Indicates whether the base service and tracker registrations are done.
   bool registered_observers_;
 
   DISALLOW_COPY_AND_ASSIGN(PrefProxyConfigService);
 };
 
 #endif  // CHROME_BROWSER_NET_PREF_PROXY_CONFIG_SERVICE_H_