events: Change gesture-event handler in EventHandler to not return any values.

ui/views/controls/menu/menu_host_root_view.cc

Index: ui/views/controls/menu/menu_host_root_view.cc
diff --git a/ui/views/controls/menu/menu_host_root_view.cc b/ui/views/controls/menu/menu_host_root_view.cc
index 8b6bd3e82f2200d5c8614c38b0fc0d92797f9408..ad8bf0a0121aa332a0450a383a9a0218b4adafea 100644
--- a/ui/views/controls/menu/menu_host_root_view.cc
+++ b/ui/views/controls/menu/menu_host_root_view.cc
@@ -62,16 +62,16 @@ bool MenuHostRootView::OnMouseWheel(const ui::MouseWheelEvent& event) {
 #endif
 }
 
-ui::EventResult MenuHostRootView::DispatchGestureEvent(
+void MenuHostRootView::DispatchGestureEvent(
     ui::GestureEvent* event) {
-  ui::EventResult result = RootView::DispatchGestureEvent(event);
-  if (result != ui::ER_UNHANDLED)
-    return result;
+  RootView::DispatchGestureEvent(event);
+  if (event->handled())
+    return;
   // ChromeOS uses MenuController to forward events like other
   // mouse events.
   if (!GetMenuController())
-    return ui::ER_UNHANDLED;
-  return GetMenuController()->OnGestureEvent(submenu_, event);
+    return;
+  GetMenuController()->OnGestureEvent(submenu_, event);
 }
 
 MenuController* MenuHostRootView::GetMenuController() {