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      1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CHROME_BROWSER_NET_PREF_PROXY_CONFIG_TRACKER_H_
      6 #define CHROME_BROWSER_NET_PREF_PROXY_CONFIG_TRACKER_H_
      7 
      8 #include "base/basictypes.h"
      9 #include "base/memory/scoped_ptr.h"
     10 
     11 namespace net {
     12 class ProxyConfigService;
     13 }
     14 
     15 // Interface for a class that tracks proxy preferences. The purpose of the
     16 // concrete class is to track changes in the Preferences, to translates the
     17 // preferences to net::ProxyConfig and to push the result over to a
     18 // net::ProxyConfigService onto the IO thread.
     19 class PrefProxyConfigTracker {
     20  public:
     21   PrefProxyConfigTracker();
     22   virtual ~PrefProxyConfigTracker();
     23 
     24   // Creates a net::ProxyConfigService and keeps a pointer to it. After this
     25   // call, this tracker forwards any changes of proxy preferences to the created
     26   // ProxyConfigService. The returned ProxyConfigService must not be deleted
     27   // before DetachFromPrefService was called. Takes ownership of the passed
     28   // |base_service|, which can be NULL. This |base_service| provides the proxy
     29   // settings of the OS (except of ChromeOS). This must be called on the
     30   // UI thread.
     31   virtual scoped_ptr<net::ProxyConfigService> CreateTrackingProxyConfigService(
     32       scoped_ptr<net::ProxyConfigService> base_service) = 0;
     33 
     34   // Releases the PrefService passed upon construction and the |base_service|
     35   // passed to CreateTrackingProxyConfigService. This must be called on the UI
     36   // thread.
     37   virtual void DetachFromPrefService() = 0;
     38 
     39  private:
     40   DISALLOW_COPY_AND_ASSIGN(PrefProxyConfigTracker);
     41 };
     42 
     43 #endif  // CHROME_BROWSER_NET_PREF_PROXY_CONFIG_TRACKER_H_
     44