Version 3.20.11.1

Reverts to the state of 3.20.9.1 plus additional rollback of r15883

R=jkummerow@chromium.org

Review URL: https://chromiumcodereview.appspot.com/21173004

git-svn-id: https://v8.googlecode.com/svn/trunk@15975 ce2b1a6d-e550-0410-aec6-3dcde31c8c00