Add is_fullscreen to video updates

ash/wm/video_detector.cc

Index: ash/wm/video_detector.cc
diff --git a/ash/wm/video_detector.cc b/ash/wm/video_detector.cc
index 5b32a531b104d2a6a301469141551f6aa0456c05..a4dca431f5600315bd0c1bc3b45cc8bf4ef3c304 100644
--- a/ash/wm/video_detector.cc
+++ b/ash/wm/video_detector.cc
@@ -5,6 +5,7 @@
 #include "ash/wm/video_detector.h"
 
 #include "ash/shell.h"
+#include "ash/wm/window_util.h"
 #include "ui/aura/env.h"
 #include "ui/aura/root_window.h"
 #include "ui/aura/window.h"
@@ -103,7 +104,10 @@ void VideoDetector::MaybeNotifyObservers(aura::Window* window,
   if (!window->GetBoundsInRootWindow().Intersects(root_bounds))
     return;
 
-  FOR_EACH_OBSERVER(VideoDetectorObserver, observers_, OnVideoDetected());
+  bool is_fullscreen = wm::IsWindowFullscreen(window);
+  FOR_EACH_OBSERVER(VideoDetectorObserver,
+                    observers_,
+                    OnVideoDetected(is_fullscreen));
   last_observer_notification_time_ = now;
 }