GitLab

The tests raced because each test case was changing a global flag potentially in parallel.
Instead of having separate test cases that each set the flag, have
separate tests objects for each value of the flag, and set the flag in the constructor to avoid races.

BUG=709112
TBR=hbos@chromium.org

Review-Url: https://codereview.chromium.org/2805903002
Cr-Commit-Position: refs/heads/master@{#462928}