Revert of [GCM] Start GCMChannelStatusSyncer when GCM is disabled (patchset #2 id:20001 of https://codereview.chromium.org/
653843003/)
Reason for revert:
Reverted due to that the fix is not complete. Will fix one more issue we find and reland the patch.
Original issue's description:
> [GCM] Start GCMChannelStatusSyncer when GCM is disabled
>
> We need to start GCMChannelStatusSyncer when GCM is disabled in order
> to poll the server to find out when it is reenabled.
>
> Also if server returns empty response, we should not treat it as error
> and trigger the backoff logic.
>
> BUG=423415
> TEST=new tests added
>
> Committed: https://crrev.com/
9e9dd3b7798b3500d70941af04b1325ef9a0b544
> Cr-Commit-Position: refs/heads/master@{#299518}
TBR=fgorski@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=423415
Review URL: https://codereview.chromium.org/
657703002
Cr-Commit-Position: refs/heads/master@{#299579}