tree 7e5daa065982d909da229843d5121e8cd5aa47ae
parent dc148d24cc11845036063a2876c9bfef03d00ce5
author Mathieu Chartier <mathieuc@google.com> 1459981639 -0700
committer Mathieu Chartier <mathieuc@google.com> 1459983000 -0700

Fix regression in ModUnionTable RAM usage

We forgot to check if a reference changed before assigning it back,
this caused extra dirty pages in the image.

BusinessCard .art PSS
Before: 1678 KB
After: 991 KB

System wide .art PSS goes down ~20MB on my shamu.

Bug: 27906566

(cherry picked from commit 014885a8561f2415cb19ebde1e4084b88d63b746)

Change-Id: I64d149f10f3ef1ed1cb61810282559b47823014c