Version 3.27.23.1 (merged r21740)

Revert "Support external startup data in V8."

BUG=
TBR=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/324923002

git-svn-id: https://v8.googlecode.com/svn/trunk@21741 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Merge remote-tracking branch 'upstream/trunk' into trunk