Fix preparser build with snapshot=off

Review URL: https://codereview.chromium.org/14159006

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@14247 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Enable pretenuring of fast literals in high promotion mode.

BUG=

Review URL: https://codereview.chromium.org/13952008

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@14248 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Add tests for GlobalHandles::IterateObjectGroups.

BUG=none
TEST=cctest/test-global-handles

Review URL: https://codereview.chromium.org/13952005

Patch from Marja Hölttä <marja@chromium.org>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@14249 ce2b1a6d-e550-0410-aec6-3dcde31c8c00