Test for UrlHandlerServiceProvider

Refactors url checking into UrlAllowed function for testing.

Bug: 935150
Change-Id: I0ccea21c1255c0cd82fc3994a54a9b06b1fd5a42
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1520519
Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Commit-Queue: Joel Hockey <joelhockey@chromium.org>
Cr-Commit-Position: refs/heads/master@{#640518}
4 files changed