Merge r7635 "Initialize ThreadLocalTop" to trunk.

BUG=http://crbug.com/79393
TBR=ager@chromium.org
Review URL: http://codereview.chromium.org/6874024

git-svn-id: http://v8.googlecode.com/svn/trunk@7636 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
3 files changed