GitLab

Create a SubresourceFilter interface in mojo. Adjust the tests so
that we can capture the send of the message to the MockRenderProcess.

BUG=993189,820612

Change-Id: I72f5d2ba3305955165fea2555271089812ada8ba
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2633353
Commit-Queue: Dave Tapuska <dtapuska@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Ken Buchanan <kenrb@chromium.org>
Reviewed-by: Charlie Harrison <csharrison@chromium.org>
Cr-Commit-Position: refs/heads/master@{#844893}