Chrome OS: avoid suspending on lid close when casting is active.

chrome/browser/media/media_capture_devices_dispatcher.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 CHROME_BROWSER_MEDIA_MEDIA_CAPTURE_DEVICES_DISPATCHER_H_
 #define CHROME_BROWSER_MEDIA_MEDIA_CAPTURE_DEVICES_DISPATCHER_H_
 
 #include <deque>
 #include <list>
 #include <map>
@@ skipping 224 matching lines @@
   // MEDIA_REQUEST_STATE_DONE state.  Sessions are remove when
   // MEDIA_REQUEST_STATE_CLOSING is encountered.
   struct DesktopCaptureSession {
     int render_process_id;
     int render_view_id;
     int page_request_id;
   };
   typedef std::list<DesktopCaptureSession> DesktopCaptureSessions;
   DesktopCaptureSessions desktop_capture_sessions_;
 
+  // Number of outstanding screen sharing sessions (includes both tab capture
+  // and desktop capture).
+  int screen_sharing_count_;
+
   DISALLOW_COPY_AND_ASSIGN(MediaCaptureDevicesDispatcher);
 };
 
 #endif  // CHROME_BROWSER_MEDIA_MEDIA_CAPTURE_DEVICES_DISPATCHER_H_