GitLab

Removes duplicate Identity test APIs with similar intent, as well as
duplicated code to create identities.

Bug: 1103274
Change-Id: I2730287d5efe430dd0b9ef8dfb255648c5c82329
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2332673Reviewed-by: Sylvain Defresne <sdefresne@chromium.org>
Reviewed-by: Jérôme Lebel <jlebel@chromium.org>
Commit-Queue: Nohemi Fernandez <fernandex@chromium.org>
Cr-Commit-Position: refs/heads/master@{#795478}