events: Get rid of GestureStatus in favour of EventResult.

ui/views/controls/button/menu_button.cc

Index: ui/views/controls/button/menu_button.cc
diff --git a/ui/views/controls/button/menu_button.cc b/ui/views/controls/button/menu_button.cc
index 8724cc5035b74c3e27e9ce4990588c8bf61387c2..0e065156e86d8c3720dd3bd5183548960ed12cca 100644
--- a/ui/views/controls/button/menu_button.cc
+++ b/ui/views/controls/button/menu_button.cc
@@ -219,11 +219,11 @@ void MenuButton::OnMouseExited(const ui::MouseEvent& event) {
   }
 }
 
-ui::GestureStatus MenuButton::OnGestureEvent(const ui::GestureEvent& event) {
+ui::EventResult MenuButton::OnGestureEvent(const ui::GestureEvent& event) {
   if (state() != BS_DISABLED && event.type() == ui::ET_GESTURE_TAP) {
     if (Activate())
-      return ui::GESTURE_STATUS_CONSUMED;
-    return ui::GESTURE_STATUS_UNKNOWN;
+      return ui::ER_CONSUMED;
+    return ui::ER_UNHANDLED;
   }
   return TextButton::OnGestureEvent(event);
 }