Revert of Implements RLZTrackerDelegate on iOS. (patchset #2 id:40001 of https://codereview.chromium.org/
1242373002/)
Reason for revert:
Landed wrong patchset.
Original issue's description:
> Implements RLZTrackerDelegate on iOS.
>
> BUG=511570
>
> Committed: https://crrev.com/
8ff2e5ea76f4aed908188f0368ccb12d290236a7
> Cr-Commit-Position: refs/heads/master@{#339676}
TBR=droger@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=511570
Review URL: https://codereview.chromium.org/
1250693003
Cr-Commit-Position: refs/heads/master@{#339685}