Enable immersive fullscreen on Windows Ash.

ash/wm/system_gesture_event_filter.cc

Index: ash/wm/system_gesture_event_filter.cc
diff --git a/ash/wm/system_gesture_event_filter.cc b/ash/wm/system_gesture_event_filter.cc
index 1c318327a8ed85d384d1e8435cbaf28b291ba759..2499726d20d25d5eea17bfcba947b3a231c2c287 100644
--- a/ash/wm/system_gesture_event_filter.cc
+++ b/ash/wm/system_gesture_event_filter.cc
@@ -65,7 +65,9 @@ void SystemGestureEventFilter::OnGestureEvent(ui::GestureEvent* event) {
 
   if (event->type() == ui::ET_GESTURE_WIN8_EDGE_SWIPE &&
       shelf_gesture_handler_->ProcessGestureEvent(*event)) {
-    event->StopPropagation();
+    // Do not stop propagation, since the immersive fullscreen controller may
+    // need to handle this event.
+    return;

[pkotwicz, 2014/03/13 18:34:32]

Nits: - Return is unncessary given that this is the end of the function?
      - "the immersive fullscreen controller" -> ImmersiveFullscreenController

[zturner, 2014/03/13 19:28:10]

I put return here so that it is clear this should be an early out, so that
anyone modifying the function later will simply need to add to the end and
reduce the risk of introducing a bug.

   }
 }