Previously, Function("++f`...`) would not throw an exception until the
created function was called. Now, it throws an early ReferenceError.

This change matches the behaviour in JavaScriptCore and SpiderMonkey.

Ordinary calls such as Function("++f()") are still thrown at runtime,
also compatible with JavaScriptCore and SpiderMonkey.

BUG=v8:4480, v8:6910
R=marja@chromium.org, littledan@chromium.org

Change-Id: If31c6d360a0464744eff5d8dd377ebff184ae00e
Reviewed-on: https://chromium-review.googlesource.com/712794
Commit-Queue: Caitlin Potter <caitp@igalia.com>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48553}