Revert of Create a new AccountTrackerService (patchset #8 of https://codereview.chromium.org/
425823002/)
Reason for revert:
Likely causing chrome.browser.signin.OAuth2TokenServiceIntegrationTest failures on Android.
TBR=rogerta@chromium.org
NOTREECHECKS=true
NOTRY=true
Original issue's description:
> Create a new AccountTrackerService PKS based on the existing AccountTracker.
>
> This CL is one part of the effort to change chrome to use gaiaid instead of
> email address as the unique id for an account.
>
> BUG=341408
>
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=291263
Review URL: https://codereview.chromium.org/
490403002
Cr-Commit-Position: refs/heads/master@{#291335}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@291335 0039d316-1c4b-4281-b951-d872f2087c98