gfx::Screen: Replace GetWindowUnderCursor() with IsWindowUnderCursor().

ui/views/controls/menu/menu_controller.cc

Index: ui/views/controls/menu/menu_controller.cc
diff --git a/ui/views/controls/menu/menu_controller.cc b/ui/views/controls/menu/menu_controller.cc
index 6290ab9e3edf2e8dddf0fb195635f3887ad7b42c..e1ce83b5fb9ccd0dcb4adc20b7901e58307dbf57 100644
--- a/ui/views/controls/menu/menu_controller.cc
+++ b/ui/views/controls/menu/menu_controller.cc
@@ -1443,10 +1443,10 @@ bool MenuController::ShowSiblingMenu(SubmenuView* source,
     return false;
   }
 
-  gfx::NativeWindow window_under_mouse =
-      display::Screen::GetScreen()->GetWindowUnderCursor();
   // TODO(oshima): Replace with views only API.
-  if (!owner_ || window_under_mouse != owner_->GetNativeWindow())
+  bool window_under_mouse = display::Screen::GetScreen()->
+                            IsWindowUnderCursor(owner_->GetNativeWindow());

[sky, 2016/05/02 23:01:43]

This crashes if owner_ is null.

+  if (!owner_ || !window_under_mouse)
     return false;
 
   // The user moved the mouse outside the menu and over the owning window. See