chromeos: Block system suspend while uploading files to Drive

content/browser/power_save_blocker_impl.h

-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Copyright (c) 2013 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_
+#ifndef CONTENT_BROWSER_POWER_SAVE_BLOCKER_IMPL_H_
+#define CONTENT_BROWSER_POWER_SAVE_BLOCKER_IMPL_H_
 
-#include <string>
-#include <vector>
-
-#include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
-#include "content/common/content_export.h"
+#include "content/public/browser/power_save_blocker.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 {
+class PowerSaveBlockerImpl : public PowerSaveBlocker {
  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.
-  PowerSaveBlocker(PowerSaveBlockerType type, const std::string& reason);
-  ~PowerSaveBlocker();
+  PowerSaveBlockerImpl(PowerSaveBlockerType type, const std::string& reason);
+  virtual ~PowerSaveBlockerImpl();
 
  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 PowerSaveBlocker::Delegate
   //     : public base::RefCounted<PowerSaveBlocker::Delegate> {
   //  private:
   //   friend class base::RefCounted<Delegate>;
   //   ~Delegate() {}
   // };
   scoped_refptr<Delegate> delegate_;
 
-  DISALLOW_COPY_AND_ASSIGN(PowerSaveBlocker);
+  DISALLOW_COPY_AND_ASSIGN(PowerSaveBlockerImpl);
 };
 
 }  // namespace content
 
-#endif  // CONTENT_BROWSER_POWER_SAVE_BLOCKER_H_
+#endif  // CONTENT_BROWSER_POWER_SAVE_BLOCKER_IMPL_H_