[8] request for review: 7168550 [macosx] duplicate OGL context state changes related to vertex cache

[Dmitry Cherepanov]

Here's a patch for the 'disappearing text' problem reproducible in 
dual-screen environment. The fix duplicates some context state changes 
(which aren't shared across contexts) and the fix also enables switching 
between contexts from SetScratchSurface (switching 'offscreen' contexts 
from the flusher thread) to make sure that we'll update the state in the 
proper context.

More info - http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7168550 
(the bug report will become visible soon)
Webrev - http://cr.openjdk.java.net/~dcherepanov/7168550/webrev.0/

Thanks,
Dmitry