GitLab

Fix TimeFormat tests and enable them on Android

The test is flaky/failing apparently because FromLocalExplode is flaky.
Use FromUTCExplode and the fixed timezone (America/Los_Angeles)
instead of the default timezone of wherever the test runs.

Bug: 671429, 582915
Test: base_unittests --gtest_filter=TimeFormat*
Change-Id: Ia7bd77dca5ef3712cc2516e59387f80899820dab
Reviewed-on: https://chromium-review.googlesource.com/748220
Commit-Queue: Jungshik Shin <jshin@chromium.org>
Reviewed-by: Mark Mentovai <mark@chromium.org>
Cr-Commit-Position: refs/heads/master@{#513201}