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: I96c330694e3503fe2df66621375d2bf76115e325
Reviewed-on: https://chromium-review.googlesource.com/181491Tested-by: Nicolas Capens <nicolascapens@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>