Fix menu corners: the menu background was being painted as a rect when in fact,

ui/views/controls/menu/menu_host.cc

Index: ui/views/controls/menu/menu_host.cc
diff --git a/ui/views/controls/menu/menu_host.cc b/ui/views/controls/menu/menu_host.cc
index bea46ac169922e5271b83a90b6788360a65e1370..8c2374b905c6d09a5807cf9614ad96a7a462d8d6 100644
--- a/ui/views/controls/menu/menu_host.cc
+++ b/ui/views/controls/menu/menu_host.cc
@@ -36,16 +36,17 @@ void MenuHost::InitMenuHost(Widget* parent,
   params.has_dropshadow = true;
   params.parent = parent ? parent->GetNativeView() : NULL;
   params.bounds = bounds;
-  Init(params);
 
-  if (ui::NativeTheme::IsNewMenuStyleEnabled()) {
-    // TODO(yefim): Investigate it more on aura.
-    gfx::Path path;
-    RoundRectPainter::CreateRoundRectPath(bounds, &path);
-    SetShape(path.CreateNativeRegion());
-  }
+  const MenuController* menu_controller =
+      submenu_->GetMenuItem()->GetMenuController();
+  const MenuConfig& menu_config = submenu_->GetMenuItem()->GetMenuConfig();
+  if (menu_controller && menu_config.corner_radius > 0)
+    params.transparent = true;
+  Init(params);
 
   SetContentsView(contents_view);
+  if (menu_controller && menu_config.corner_radius > 0)
+    SetOpacity(0);
   ShowMenuHost(do_capture);
 }