Move lifecycle notification check to V8ScriptController.

This CL moves checks for lifecycle notofication reentrancy
from ScriptController to V8ScriptController so that more of
callsites is covered by the check.

TEST=none
BUG=297482
R=abarth@chromium.org

Review URL: https://codereview.chromium.org/25461002

git-svn-id: svn://svn.chromium.org/blink/trunk@158616 bbb929c8-8fbe-4397-9dbb-9b2b20218538