Prepare ui/ module for compilation with OS X 10.7 deployment target.

ui/views/controls/menu/menu_runner_impl_cocoa.mm

Index: ui/views/controls/menu/menu_runner_impl_cocoa.mm
diff --git a/ui/views/controls/menu/menu_runner_impl_cocoa.mm b/ui/views/controls/menu/menu_runner_impl_cocoa.mm
index 47547814cf831b6d72bcb29a2e2ea02ad41e63fa..b623a18428f4ca969efeab49e79b5ade9eb6dfd7 100644
--- a/ui/views/controls/menu/menu_runner_impl_cocoa.mm
+++ b/ui/views/controls/menu/menu_runner_impl_cocoa.mm
@@ -41,7 +41,7 @@ base::scoped_nsobject<NSView> CreateMenuAnchorView(
     const gfx::Rect& screen_bounds,
     NSMenuItem* checked_item) {
   NSRect rect = gfx::ScreenRectToNSRect(screen_bounds);
-  rect.origin = [window convertScreenToBase:rect.origin];
+  rect.origin = [window convertRectFromScreen:rect].origin;

[Avi (use Gerrit), 2016/03/08 20:07:54]

Do

rect = [window convertRectFromScreen:rect];

Again, we were compensating for the lack of rect conversion by only converting
the origin. Now that we have full rect conversion, can we let the conversion do
its thing?

[erikchen, 2016/03/08 20:57:41]

Done.

   rect = [[window contentView] convertRect:rect fromView:nil];
 
   // If there's no checked item (e.g. Combobox::STYLE_ACTION), NSMenu will