[Extensions] Update WebNavigationApiTests to manifest v2

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

Bug: 816679
Change-Id: I755823e0335de01994d5b2b8dccfbc795795d0ee
Reviewed-on: https://chromium-review.googlesource.com/1018412
Commit-Queue: Devlin <rdevlin.cronin@chromium.org>
Reviewed-by: Istiaque Ahmed <lazyboy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#552109}
1 file changed