Fix TranslateInfobarTests and move to ChromePublic.
This fixes the tests so they now pass on local devices. Unfortunately,
they still fail on the bots because the bots have an old version of
Google Play Services installed (and that can't be fixed easily; see
http://crbug.com/514449).
Fixes:
- Clear data before running the test, since that resets the count of how many
times the translate infobar has been dismissed and affects when the "never
translate?" infobar will appear
- Wait for the infobar to finish swapping before checking the state of the
"never translate?" infobar
BUG=505040
Review URL: https://codereview.chromium.org/
1251213002
Cr-Commit-Position: refs/heads/master@{#340608}