Revert of Don't create a sync node when updating an URL that wasn't typed.

Revert of Don't create a sync node when updating an URL that wasn't typed. (patchset #1 id:1 of https://codereview.chromium.org/1126633005/)

Reason for revert:
Suspected to cause failure of
MigrationSingleClientTest.AllTypesIndividually
on Linux GN:

https://build.chromium.org/p/chromium.linux/builders/Linux%20GN/builds/28301

Original issue's description:
> Don't create a sync node when updating an URL that wasn't typed.
>
> TypedUrlChangeProcessor is a HistoryService observer and gets notified
> about changes to all addresses, not just typed ones. This means that
> when HistoryService::SetPageTitle() is called for a non-typed URL,
> TypedUrlChangeProcessor::OnURLsModified() will be triggered and,
> consequently, TypedUrlChangeProcessor::CreateOrUpdateSyncNode().
> As the name suggests, if the modified node was not previously present
> (because it was filtered out by ShouldSyncVisit() in OnURLVisited()),
> it would be created.
> End effect was that *all* URLs that had their title updated (which means
> every page that has a <title> tag) were synced, even if they were not typed.
>
> The solution is to return early in CreateOrUpdateSyncNode() if we detect
> that the URL in question has no typed visits.
>
> (Caused by https://codereview.chromium.org/1087773002/)
>
> BUG=
>
> Committed: https://crrev.com/3be1b71d63be98a42c0e98673ff35fcd4fc738ab
> Cr-Commit-Position: refs/heads/master@{#329370}

TBR=maniscalco@chromium.org,pvalenzuela@chromium.org,mpawlowski@opera.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=

Committed: https://crrev.com/ebb18035affaa9555dd56e0ac9ab1daf61c64916
Cr-Commit-Position: refs/heads/master@{#329396}

[pneubeck (no reviews), 2015-05-12 13:16:20]

Created Revert of Don't create a sync node when updating an URL that wasn't
typed.

[commit-bot: I haz the power, 2015-05-12 13:17:00]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1127353004/1

[commit-bot: I haz the power, 2015-05-12 13:17:44]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-05-12 13:18:26]

Patchset 1 (id:??) landed as
https://crrev.com/ebb18035affaa9555dd56e0ac9ab1daf61c64916
Cr-Commit-Position: refs/heads/master@{#329396}