events: Get rid of GestureStatus in favour of EventResult.

ash/accelerators/accelerator_filter.cc

Index: ash/accelerators/accelerator_filter.cc
diff --git a/ash/accelerators/accelerator_filter.cc b/ash/accelerators/accelerator_filter.cc
index 18bf9c2b052c9eacaa8d4d31c69e1c3d37edb3b7..a9c6825c52e8fb04c7930e9a21821ca2caf809de 100644
--- a/ash/accelerators/accelerator_filter.cc
+++ b/ash/accelerators/accelerator_filter.cc
@@ -89,10 +89,10 @@ ui::TouchStatus AcceleratorFilter::PreHandleTouchEvent(
   return ui::TOUCH_STATUS_UNKNOWN;
 }
 
-ui::GestureStatus AcceleratorFilter::PreHandleGestureEvent(
+ui::EventResult AcceleratorFilter::PreHandleGestureEvent(
     aura::Window* target,
     ui::GestureEvent* event) {
-  return ui::GESTURE_STATUS_UNKNOWN;
+  return ui::ER_UNHANDLED;
 }
 
 }  // namespace internal