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

ui/views/controls/menu/submenu_view.cc

Index: ui/views/controls/menu/submenu_view.cc
diff --git a/ui/views/controls/menu/submenu_view.cc b/ui/views/controls/menu/submenu_view.cc
index 71da3263c79cb0462b3ec116268e1c7d8fa030eb..0ace2d15192f5bc9676225815c49f1b1b850f143 100644
--- a/ui/views/controls/menu/submenu_view.cc
+++ b/ui/views/controls/menu/submenu_view.cc
@@ -260,8 +260,8 @@ bool SubmenuView::OnMouseWheel(const ui::MouseWheelEvent& e) {
   return true;
 }
 
-ui::EventResult SubmenuView::OnGestureEvent(ui::GestureEvent* event) {
-  ui::EventResult to_return = ui::ER_CONSUMED;
+void SubmenuView::OnGestureEvent(ui::GestureEvent* event) {
+  bool handled = true;
   switch (event->type()) {
     case ui::ET_GESTURE_SCROLL_BEGIN:
       scroll_animator_->Stop();
@@ -280,10 +280,11 @@ ui::EventResult SubmenuView::OnGestureEvent(ui::GestureEvent* event) {
       scroll_animator_->Stop();
       break;
     default:
-      to_return = ui::ER_UNHANDLED;
+      handled = false;
       break;
   }
-  return to_return;
+  if (handled)
+    event->SetHandled();
 }
 
 bool SubmenuView::IsShowing() {