Preparation to convert GetPrimaryAccount to return CoreAccountInfo

Change client code to work as if IdentityManager::GetPrimaryAccount
where returning a CoreAccountInfo instead of an AccountInfo. Method
will be updated in a followup CL.

This CL was uploaded by git cl split.

Bug: 926204
Change-Id: I23d93695dda6baf7f34263791625ee242891e3b3
Reviewed-on: https://chromium-review.googlesource.com/c/1470755
Auto-Submit: Sylvain Defresne <sdefresne@chromium.org>
Reviewed-by: Peter Boström <pbos@chromium.org>
Commit-Queue: Peter Boström <pbos@chromium.org>
Cr-Commit-Position: refs/heads/master@{#631858}
1 file changed