hg: lanai/lanai: 8232164: Lock renderqueue for least amount of time by making CAMetalLayer asynchronous

[jayathirth.d.v at oracle.com]

Changeset: a7cd182d7037
Author:    jdv
Date:      2019-10-11 15:20 +0530
URL:       https://hg.openjdk.java.net/lanai/lanai/rev/a7cd182d7037

8232164: Lock renderqueue for least amount of time by making CAMetalLayer asynchronous
Reviewed-by: aghaisas

! src/java.desktop/macosx/native/libawt_lwawt/java2d/metal/MTLLayer.h
! src/java.desktop/macosx/native/libawt_lwawt/java2d/metal/MTLLayer.m