[MacViews] Position modal sheets using ModalDialogHost.

ui/views/widget/native_widget_mac.mm

Index: ui/views/widget/native_widget_mac.mm
diff --git a/ui/views/widget/native_widget_mac.mm b/ui/views/widget/native_widget_mac.mm
index 4f92b4066336979f361d9029beb3decc76f99e0b..dbe2477faf16dccd0ae4f88321088d1607afe844 100644
--- a/ui/views/widget/native_widget_mac.mm
+++ b/ui/views/widget/native_widget_mac.mm
@@ -105,6 +105,11 @@ void NativeWidgetMac::OnWindowWillClose() {
     delete this;
 }
 
+int NativeWidgetMac::SheetPositionY() {
+  NSWindow* ns_window = GetNativeWindow();
+  return NSHeight([ns_window frame]) - NSMaxY([[ns_window contentView] frame]);

[tapted, 2015/08/26 07:27:48]

If it makes it simpler... maybe make SheetPositionY return the distance from the
bottom of the window?

Then this would be

NSView* view = GetNativeView()
return [view convertPoint:NSMakePoint(0, NSHeight([view frame])) toView:nil].y;


but this is OK too.

[jackhou1, 2015/08/27 05:38:09]

Done.

It makes the BrowserFrameMac version simpler too.

+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // NativeWidgetMac, internal::NativeWidgetPrivate implementation: