Revert of [Media Router] Allow users to update cloud services pref when sync is not active. (patchset #3 id:160001 of https://codereview.chromium.org/2078213002/ )

Reason for revert:
Caused failure on official bots.

Original issue's description:
> [Media Router] Allow users to update cloud services pref when sync is not active.
>
> There are two places users can update their cloud services pref:
> - First run flow, with a checkbox
> - Contextual menu, with a toggle
>
> Currently, users can only update their cloud services pref if they have sync enabled. There is no technical tie-in between having sync active and using cloud services. This change makes it such that users can toggle their cloud services pref locally if sync is inactive. Now, we only check that the user is authenticated. While sync is off, however, the pref will not sync across their devices.
>
> In the event where the user has already acknowledged the first run flow (locally on the profile), then turned on sync, we continue to enable cloud services.
>
> BUG=621255, 623330
>
> Committed: https://crrev.com/19a9b8f1411afe64b2163261a04245f617e25e17
> Cr-Commit-Position: refs/heads/master@{#402072}

TBR=pkasting@chromium.org,imcheng@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=621255, 623330

Review-Url: https://codereview.chromium.org/2098193002
Cr-Commit-Position: refs/heads/master@{#402073}
4 files changed