[8u-dev] Request for approval: backport 6980209: Make tracking SecondaryLoop.enter/exit methods easier

[Semyon Sadetsky]

Hello,

Could you please approve a backport to jdk8?

bug: https://bugs.openjdk.java.net/browse/JDK-6980209
jdk9 changeset: http://hg.openjdk.java.net/jdk9/client/jdk/rev/f8439c2af95a
review thread: 
http://mail.openjdk.java.net/pipermail/awt-dev/2015-March/009137.html
jdk8 webrev: http://cr.openjdk.java.net/~ssadetsky/6980209/8u/webrev.00/

The fix is identical to 9.

--Semyon