[Sync] Remove NOTREACHED from OnPreferredDataTypesPrefChange

This CL removes NOTREACHED() from
ProfileSyncService::OnPreferredDataTypesPrefChange. This check was
triggered if setChosenDataTypes is invoked soon after requestStart.

Bug: 923886
Change-Id: I1a826ba3b5e1ee64aa0ecba6107e420d0551a7ee
Reviewed-on: https://chromium-review.googlesource.com/c/1426940
Reviewed-by: Marc Treib <treib@chromium.org>
Commit-Queue: Boris Sazonov <bsazonov@chromium.org>
Cr-Commit-Position: refs/heads/master@{#624861}
1 file changed