hg: lambda/lambda/jdk: 8011137: Comparators.byKey(Comparator) behavior contradicts the spec

[henry.jen at oracle.com]

Changeset: 34443a93970a
Author:    henryjen
Date:      2013-04-01 13:41 -0700
URL:       http://hg.openjdk.java.net/lambda/lambda/jdk/rev/34443a93970a

8011137: Comparators.byKey(Comparator) behavior contradicts the spec
Summary: Revert change breaks serializability and added a intermediate Function object

! src/share/classes/java/util/Comparators.java