Support Error, SyntaxError and ReferenceError in Blink-in-JS

BUG=341031
TEST=fast/dom/private-script-unittest.html

Review URL: https://codereview.chromium.org/434343002

git-svn-id: svn://svn.chromium.org/blink/trunk@179472 bbb929c8-8fbe-4397-9dbb-9b2b20218538