hg: jdk/sandbox: 8204375: Add TimeUnit#convert(Duration)

[chris.hegarty at oracle.com]

Changeset: cb0efe0cc20e
Author:    dl
Date:      2018-06-08 11:38 -0700
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/cb0efe0cc20e

8204375: Add TimeUnit#convert(Duration)
Reviewed-by: martin, scolebourne, plevart, rriggs

! src/java.base/share/classes/java/util/concurrent/TimeUnit.java
! test/jdk/java/util/concurrent/tck/TimeUnit8Test.java