Move OAuth2TokenServiceTest to ProfileOAuth2TokenServiceTest

This CL is a part of moving access token management to
OAuth2AccessTokenManager.

It is specifically a step toward folding O2TS into PO2TS
now that the latter is only one subclass of O2TS.

It moves oauth2_token_service_unittest.cc to
profile_oauth2_token_service_unittest.cc since O2TS works
only with PO2TS.

Bug: 967598
Change-Id: I37aaa7ac759b24dacf4b8dd48b20d47b5305abb2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1697066
Commit-Queue: Julie Jeongeun Kim <jkim@igalia.com>
Reviewed-by: Colin Blundell <blundell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#676823}
3 files changed