Update ui/views menus to use async

ui/views/examples/menu_example.cc

Index: ui/views/examples/menu_example.cc
diff --git a/ui/views/examples/menu_example.cc b/ui/views/examples/menu_example.cc
index 7f38c5d853fdca18fa40e2086f49afae6229ab48..c8c8368a73f83033d9e9068e4ece327116721760 100644
--- a/ui/views/examples/menu_example.cc
+++ b/ui/views/examples/menu_example.cc
@@ -179,16 +179,12 @@ ExampleMenuButton::~ExampleMenuButton() {
 void ExampleMenuButton::OnMenuButtonClicked(MenuButton* source,
                                             const gfx::Point& point,
                                             const ui::Event* event) {
-  menu_runner_.reset(new MenuRunner(GetMenuModel(), MenuRunner::HAS_MNEMONICS));
-
-  if (menu_runner_->RunMenuAt(source->GetWidget()->GetTopLevelWidget(),
-                              this,
-                              gfx::Rect(point, gfx::Size()),
-                              MENU_ANCHOR_TOPRIGHT,
-                              ui::MENU_SOURCE_NONE) ==
-      MenuRunner::MENU_DELETED) {
-    return;
-  }
+  menu_runner_.reset(new MenuRunner(
+      GetMenuModel(), MenuRunner::HAS_MNEMONICS | MenuRunner::ASYNC));
+
+  menu_runner_->RunMenuAt(source->GetWidget()->GetTopLevelWidget(), this,
+                          gfx::Rect(point, gfx::Size()), MENU_ANCHOR_TOPRIGHT,
+                          ui::MENU_SOURCE_NONE);
 }
 
 ui::SimpleMenuModel* ExampleMenuButton::GetMenuModel() {