GitLab

This CL replaces use of AccountFetcherService::OnRefreshTokensLoaded()
method by IdentityTestEnvironment.

As per new implementation, AccountFetcherService is wrapped inside
ITE to interact with identity_apitest.

Bug: 929603
Change-Id: I95bd34d549e6a03703ca15014de87359469547e8
Reviewed-on: https://chromium-review.googlesource.com/c/1458404
Commit-Queue: Colin Blundell <blundell@chromium.org>
Reviewed-by: Colin Blundell <blundell@chromium.org>
Reviewed-by: Mihai Sardarescu <msarda@chromium.org>
Cr-Commit-Position: refs/heads/master@{#634575}