GitLab

Getting account list can take a while, especially in edge cases like
after Google Play Services update. This CL addresses this by adding
a cache for account list. Accessing the cache is cheap, so
getGoogleAccounts() and similar methods can now be safely invoked from
UI thread. The only edge case for getGoogleAccounts() is a time period
before the cache is populated after Chrome startup. In this case
getGoogleAccounts() will wait until the cache is populated. If this
waiting occurs on UI thread, it will record waiting time in
Signin.AndroidPopulateAccountCacheWaitingTime histogram.

Bug: 698258, 759798
Change-Id: I1e9b481cb4ccf4c24ff363fb7f4214d9d8c571f7
Reviewed-on: https://chromium-review.googlesource.com/675684Reviewed-by: Bernhard Bauer <bauerb@chromium.org>
Reviewed-by: Jesse Doherty <jwd@chromium.org>
Reviewed-by: Pavel Yatsuk <pavely@chromium.org>
Commit-Queue: Boris Sazonov <bsazonov@chromium.org>
Cr-Commit-Position: refs/heads/master@{#506707}