GitLab

- Use more mocks
- Remove old autoreleasepool work around

Bug: 1070657
Change-Id: Ic234ddb2e9be28048a39c365ec8c2e09eaf38d74
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2147882
Commit-Queue: John Wu <jzw@chromium.org>
Reviewed-by: Hiroshi Ichikawa <ichikawa@chromium.org>
Cr-Commit-Position: refs/heads/master@{#759111}