[8u-dev] Request for approval: 8138764, 8041900

[Sergey Bylokhov]

Hello,
These are a direct back ports from jdk 9 to jdk 8u-dev.

8138764: In some cases the usage of TreeLock can be replaced by other 
synchronization
Bug: https://bugs.openjdk.java.net/browse/JDK-8138764
Webrev can be found at: http://cr.openjdk.java.net/~serb/8138764/webrev.00
jdk9 changeset: http://hg.openjdk.java.net/jdk9/client/jdk/rev/c62b791a8960
Review: 
http://mail.openjdk.java.net/pipermail/awt-dev/2015-October/010119.html
Reviewers: Alexander Potochkin, Alexander Scherbatiy


8041900: [macosx] Java forces the use of discrete GPU
Bug: https://bugs.openjdk.java.net/browse/JDK-8041900
Webrev can be found at: http://cr.openjdk.java.net/~serb/8041900/webrev.00
jdk9 changeset: http://hg.openjdk.java.net/jdk9/client/jdk/rev/0746c20f1365
Review: 
http://mail.openjdk.java.net/pipermail/2d-dev/2015-October/005747.html
Reviewers: Alexander Scherbatiy, Semyon Sadetsky

-- 
Best regards, Sergey.