updating owners in CUS

asargent@ no longer needed as we now we have sorin@ who is more
familiar with the current code.

TBR=sorin,laforge
BUG=none

Review URL: https://codereview.chromium.org/107733004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@242954 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 242954