hg: jdk8/tl/jdk: 6898310: (cs) Charset cache lookups should be synchronized

[xueming . shen]

Changeset: 812c6d4d6a58
Author:    sherman
Date:      2011-09-02 10:20 -0700
URL:       http://hg.openjdk.java.net/jdk8/tl/jdk/rev/812c6d4d6a58

6898310: (cs) Charset cache lookups should be synchronized
Summary: synchronize the lookup in iterator
Reviewed-by: alanb

! src/share/classes/sun/nio/cs/AbstractCharsetProvider.java