Fix FindExtendedAccountInfoForAccount

The method should return an AccountInfo even if some of the information
is missing (i.e. has not been fetched by AccountFetcherService yet) as
the tests usually do not set extended information on AccountInfo.

Bug: 926204
Change-Id: Iba9fafa25914618eefd09310cf91739159373895
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1503456
Reviewed-by: David Roger <droger@chromium.org>
Commit-Queue: Sylvain Defresne <sdefresne@chromium.org>
Auto-Submit: Sylvain Defresne <sdefresne@chromium.org>
Cr-Commit-Position: refs/heads/master@{#638572}
2 files changed