GetProfileByUser deprecated and renamed to GetProfileByUserUnsafe.
Created safe alternative which is called GetProfileByUser.
The plan is to investigate all usages of GetProfileByUserUnsafe one by one and
replace them with a safe version, if possible.
Also warning message added for cases when GetProfileByUserUnsafe returns profile
of a wrong user or signin profile. That will help us to detect suspicious calls
to GetProfileByUserUnsafe while work in progress.
BUG=361528
TBR=yoz,dcheng,agl,dewittj,skuhne,derat
Review URL: https://codereview.chromium.org/
445353004
Cr-Commit-Position: refs/heads/master@{#289011}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@289011 0039d316-1c4b-4281-b951-d872f2087c98