The Error should be consumed in the Context call.

BUG=angleproject:747

Change-Id: I5daae602e8f6c7feed89573c6c9387c295ba9a32
Reviewed-on: https://chromium-review.googlesource.com/421258Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>