Create a fake variable for function identifiers used as a variable identifier to allow continuing compilation after reporting the error.

BUG=chromium:330222

Change-Id: I553804b3db95cd5dc946e94193fc9181d6b2c032
Reviewed-on: https://chromium-review.googlesource.com/180977Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Nicolas Capens <nicolascapens@chromium.org>