Blink-in-JS: Output a correct JS file name and line number when an exception is thrown

Currently there is a bug on V8 APIs on Message objects, and they don't return valid values
when they are called at the first time if V8 has a pending exception.
We need to call twice in order to get valid values.

This is a temporary fix in the Blink side until we fix the V8 side.

BUG=341031

Review URL: https://codereview.chromium.org/478623002

git-svn-id: svn://svn.chromium.org/blink/trunk@180339 bbb929c8-8fbe-4397-9dbb-9b2b20218538