content/browser/power_save_blocker_impl.h

   1 // Copyright (c) 2013 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 CONTENT_BROWSER_POWER_SAVE_BLOCKER_IMPL_H_
   6 #define CONTENT_BROWSER_POWER_SAVE_BLOCKER_IMPL_H_
   7
   8 #include "base/memory/ref_counted.h"
   9 #include "content/public/browser/power_save_blocker.h"
  10
  11 namespace content {
  12
  13 class PowerSaveBlockerImpl : public PowerSaveBlocker {
  14  public:
  15   PowerSaveBlockerImpl(PowerSaveBlockerType type, const std::string& reason);
  16   virtual ~PowerSaveBlockerImpl();
  17
  18  private:
  19   class Delegate;
  20
  21   // Implementations of this class may need a second object with different
  22   // lifetime than the RAII container, or additional storage. This member is
  23   // here for that purpose. If not used, just define the class as an empty
  24   // RefCounted (or RefCountedThreadSafe) like so to make it compile:
  25   // class PowerSaveBlocker::Delegate
  26   //     : public base::RefCounted<PowerSaveBlocker::Delegate> {
  27   //  private:
  28   //   friend class base::RefCounted<Delegate>;
  29   //   ~Delegate() {}
  30   // };
  31   scoped_refptr<Delegate> delegate_;
  32
  33   DISALLOW_COPY_AND_ASSIGN(PowerSaveBlockerImpl);
  34 };
  35
  36 }  // namespace content
  37
  38 #endif  // CONTENT_BROWSER_POWER_SAVE_BLOCKER_IMPL_H_