Power save blocker: switch to new implementation.

content/browser/power_save_blocker.h

 // Copyright (c) 2012 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 CONTENT_BROWSER_POWER_SAVE_BLOCKER_H_
 #define CONTENT_BROWSER_POWER_SAVE_BLOCKER_H_
 #pragma once
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 #include "content/common/content_export.h"
 
+namespace content {
+
 // A RAII-style class to block the system from entering low-power (sleep) mode.
+// This class is thread-safe; it may be constructed and deleted on any thread.
 class CONTENT_EXPORT PowerSaveBlocker {
  public:
   enum PowerSaveBlockerType {
-    kPowerSaveBlockPreventNone = -1,
-
-    // Prevent the system from going to sleep; allow display sleep.
-    kPowerSaveBlockPreventSystemSleep,
-
-    // Prevent the system or display from going to sleep.
-    kPowerSaveBlockPreventDisplaySleep,
-
-    // Count of the values; not valid as a parameter.
-    kPowerSaveBlockPreventStateCount
-  };
-
-  // Pass in the level of sleep prevention desired. kPowerSaveBlockPreventNone
-  // is not a valid option.
-  explicit PowerSaveBlocker(PowerSaveBlockerType type);
-  ~PowerSaveBlocker();
-
- private:
-  // Platform-specific function called when enable state is changed.
-  // Guaranteed to be called only from the UI thread.
-  static void ApplyBlock(PowerSaveBlockerType type);
-
-  // Called only from UI thread.
-  static void AdjustBlockCount(const std::vector<int>& deltas);
-
-  // Invokes AdjustBlockCount on the UI thread.
-  static void PostAdjustBlockCount(const std::vector<int>& deltas);
-
-  // Returns the highest-severity block type in use.
-  static PowerSaveBlockerType HighestBlockType();
-
-  PowerSaveBlockerType type_;
-
-  static int blocker_count_[];
-
-  DISALLOW_COPY_AND_ASSIGN(PowerSaveBlocker);
-};
-
-namespace content {
-
-// NOT READY YET. PowerSaveBlocker above is soon to be replaced by this class,
-// but it's not done yet so client code should use the one above for now.
-// A RAII-style class to block the system from entering low-power (sleep) mode.
-// This class is thread-safe; it may be constructed and deleted on any thread.
-class CONTENT_EXPORT PowerSaveBlocker2 {
- public:
-  enum PowerSaveBlockerType {
     // Prevent the application from being suspended. On some platforms, apps may
     // be suspended when they are not visible to the user. This type of block
     // requests that the app continue to run in that case, and on all platforms
     // prevents the system from sleeping.
     // Example use cases: downloading a file, playing audio.
     kPowerSaveBlockPreventAppSuspension,
 
     // Prevent the display from going to sleep. This also has the side effect of
     // preventing the system from sleeping, but does not necessarily prevent the
     // app from being suspended on some platforms if the user hides it.
     // Example use case: playing video.
     kPowerSaveBlockPreventDisplaySleep,
   };
 
   // Pass in the type of power save blocking desired. If multiple types of
   // blocking are desired, instantiate one PowerSaveBlocker for each type.
   // |reason| may be provided to the underlying system APIs on some platforms.
-  PowerSaveBlocker2(PowerSaveBlockerType type, const std::string& reason);
-  ~PowerSaveBlocker2();
+  PowerSaveBlocker(PowerSaveBlockerType type, const std::string& reason);
+  ~PowerSaveBlocker();
 
  private:
   class Delegate;
 
   // Implementations of this class may need a second object with different
   // lifetime than the RAII container, or additional storage. This member is
   // here for that purpose. If not used, just define the class as an empty
   // RefCounted (or RefCountedThreadSafe) like so to make it compile:
-  // class PowerSaveBlocker2::Delegate
-  //     : public base::RefCounted<PowerSaveBlocker2::Delegate> {
+  // class PowerSaveBlocker::Delegate
+  //     : public base::RefCounted<PowerSaveBlocker::Delegate> {
   //  private:
   //   friend class base::RefCounted<Delegate>;
   //   ~Delegate() {}
   // };
   scoped_refptr<Delegate> delegate_;
 
-  DISALLOW_COPY_AND_ASSIGN(PowerSaveBlocker2);
+  DISALLOW_COPY_AND_ASSIGN(PowerSaveBlocker);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_POWER_SAVE_BLOCKER_H_