GitLab

AppServiceProxy.CreateForTesting and
AppServiceAppModelBuilder.SetAppServiceProxyForTesting can be removed,
as proxy can use ReInitializeForTesting to reset the connector for test
cases. So those two functions are no longer used.

BUG=998004

Change-Id: I98b190e294493461b5af0d0aa0f3b64bc25c2e85
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1797830
Commit-Queue: Nancy Wang <nancylingwang@chromium.org>
Reviewed-by: Nigel Tao <nigeltao@chromium.org>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#695879}