Prepare removal of ObjectTemplate::New without Isolate parameter.

LOG=y
BUG=324225
R=ulan@chromium.org

Review URL: https://codereview.chromium.org/124943004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@18478 ce2b1a6d-e550-0410-aec6-3dcde31c8c00