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

chrome/browser/media/media_capture_devices_dispatcher.cc

Index: chrome/browser/media/media_capture_devices_dispatcher.cc
diff --git a/chrome/browser/media/media_capture_devices_dispatcher.cc b/chrome/browser/media/media_capture_devices_dispatcher.cc
index 29c7afbec8d820c24b7dbcf33b752af116bfd7db..45af30e2cbff8ed08ccd7057a8f8ba1adaa9a945 100644
--- a/chrome/browser/media/media_capture_devices_dispatcher.cc
+++ b/chrome/browser/media/media_capture_devices_dispatcher.cc
@@ -755,6 +755,18 @@ void MediaCaptureDevicesDispatcher::UpdateMediaRequestStateOnUIThread(
     }
   }
 
+#if defined(OS_CHROMEOS)
+  // Notify ash that screen sharing state has changed.
+  if (device.type == content::MEDIA_TAB_VIDEO_CAPTURE ||
+      device.type == content::MEDIA_DESKTOP_VIDEO_CAPTURE) {
+    if (state == content::MEDIA_REQUEST_STATE_DONE) {
+      ash::Shell::GetInstance()->OnScreenSharingStateChanged(true);

[Sergey Ulanov, 2014/01/15 22:23:45]

can ash::Shell register itself as an observer?

[Daniel Erat, 2014/01/15 22:42:59]

like haixia said, this would only be possible if this code e.g. lived in
content/ instead of chrome/

+    } else if (state == content::MEDIA_REQUEST_STATE_CLOSING) {
+      ash::Shell::GetInstance()->OnScreenSharingStateChanged(false);
+    }
+  }
+#endif
+
   FOR_EACH_OBSERVER(Observer, observers_,
                     OnRequestUpdate(render_process_id,
                                     render_view_id,