events: Get rid of GestureStatus in favour of EventResult.

ash/wm/event_rewriter_event_filter.cc

Index: ash/wm/event_rewriter_event_filter.cc
diff --git a/ash/wm/event_rewriter_event_filter.cc b/ash/wm/event_rewriter_event_filter.cc
index 3337334618a303fdb98eaf88e6d527baf0c630de..a9755f32a2db33f4fb8938dd413a59feb5cf8334 100644
--- a/ash/wm/event_rewriter_event_filter.cc
+++ b/ash/wm/event_rewriter_event_filter.cc
@@ -63,9 +63,9 @@ ui::TouchStatus EventRewriterEventFilter::PreHandleTouchEvent(
   return ui::TOUCH_STATUS_UNKNOWN;  // Not handled.
 }
 
-ui::GestureStatus EventRewriterEventFilter::PreHandleGestureEvent(
+ui::EventResult EventRewriterEventFilter::PreHandleGestureEvent(
     aura::Window* target, ui::GestureEvent* event) {
-  return ui::GESTURE_STATUS_UNKNOWN;  // Not handled.
+  return ui::ER_UNHANDLED;  // Not handled.
 }
 
 }  // namespace internal