Mark a bunch of places where we enter or leave V8 through the API.

Indiscriminately mark every place with EnsureInitialized, ON_BAILOUT,
or IsDeadCheck (even if they cannot write to V8's heap).  Also mark
callbacks, and one other place (Function::SetName) hit in Chromium.
Review URL: http://codereview.chromium.org/57049

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@1647 ce2b1a6d-e550-0410-aec6-3dcde31c8c00