Revert "Revert of https://codereview.chromium.org/110593003/"

This reverts commit c7abb25b25ba8b97948371d2bf0a2e3e78468f73.

and fixes the ashmem break

BUG=

Review URL: https://codereview.chromium.org/119753010

git-svn-id: http://skia.googlecode.com/svn/trunk@12887 2bbb7eff-a529-9590-31e7-b0007b416f81
17 files changed