[Merge] Fix minidump-related JobScheduler test failures.

BUG=694884
TEST=none
R=dfalcantara@chromium.org

Review-Url: https://codereview.chromium.org/2753173002
Cr-Commit-Position: refs/heads/master@{#457650}
(cherry picked from commit 0c77af249cab19e99fc0024b828373b1751633e2)

Review-Url: https://codereview.chromium.org/2779693004 .
Cr-Commit-Position: refs/branch-heads/3029@{#460}
Cr-Branched-From: 939b32ee5ba05c396eef3fd992822fcca9a2e262-refs/heads/master@{#454471}
2 files changed