[Extensions] Update ComponentLoaderTests to manifest v2

ComponentLoaderTests have been updated to manifest v2.
Remove the allowance for manifest v1 extensions.

Bug: 816679

Change-Id: Ic35a4f11840ea2194b16f93eb541aa62e8cd7361
Reviewed-on: https://chromium-review.googlesource.com/1025134
Reviewed-by: Karan Bhatia <karandeepb@chromium.org>
Commit-Queue: Devlin <rdevlin.cronin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#553220}
1 file changed