Impose PowerSaveBlock while remoting content via Cast or WebRTC.

content/browser/media/webrtc_internals.h

 // 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_MEDIA_WEBRTC_INTERNALS_H_
 #define CONTENT_BROWSER_MEDIA_WEBRTC_INTERNALS_H_
 
 #include "base/gtest_prod_util.h"
+#include "base/memory/scoped_ptr.h"
 #include "base/memory/singleton.h"
 #include "base/observer_list.h"
 #include "base/process/process.h"
 #include "base/values.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "ui/shell_dialogs/select_file_dialog.h"
 
 namespace content {
+
+class PowerSaveBlocker;
 class WebContents;
 class WebRTCInternalsUIObserver;
 
 // This is a singleton class running in the browser UI thread.
 // It collects peer connection infomation from the renderers,
 // forwards the data to WebRTCInternalsUIObserver and
 // sends data collecting commands to the renderers.
 class CONTENT_EXPORT WebRTCInternals : public NotificationObserver,
                                        public ui::SelectFileDialog::Listener {
  public:
@@ skipping 95 matching lines @@
   virtual void FileSelectionCanceled(void* params) OVERRIDE;
 
   // Called when a renderer exits (including crashes).
   void OnRendererExit(int render_process_id);
 
 #if defined(ENABLE_WEBRTC)
   // Enables AEC dump on all render process hosts using |aec_dump_file_path_|.
   void EnableAecDumpOnAllRenderProcessHosts();
 #endif
 
+  // Called whenever an element is added to or removed from
+  // |peer_connection_data_| to impose/release a block on suspending the current
+  // application for power-saving.
+  void CreateOrReleasePowerSaveBlocker();
+
   ObserverList<WebRTCInternalsUIObserver> observers_;
 
   // |peer_connection_data_| is a list containing all the PeerConnection
   // updates.
   // Each item of the list represents the data for one PeerConnection, which
   // contains these fields:
   // "rid" -- the renderer id.
   // "pid" -- OS process id of the renderer that creates the PeerConnection.
   // "lid" -- local Id assigned to the PeerConnection.
   // "url" -- url of the web page that created the PeerConnection.
@@ skipping 15 matching lines @@
   base::ListValue get_user_media_requests_;
 
   NotificationRegistrar registrar_;
 
   // For managing select file dialog.
   scoped_refptr<ui::SelectFileDialog> select_file_dialog_;
 
   // AEC dump (diagnostic echo canceller recording) state.
   bool aec_dump_enabled_;
   base::FilePath aec_dump_file_path_;
+
+  // While |peer_connection_data_| is non-empty, hold an instance of
+  // PowerSaveBlocker.  This prevents the application from being suspended while
+  // remoting.
+  scoped_ptr<PowerSaveBlocker> power_save_blocker_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_MEDIA_WEBRTC_INTERNALS_H_