Remove csilv from OWNERS files, add dbeam to chrome/browser/ui/webui/OWNERS

(This will be submitted on my final day on the Chrome team.)

BUG=none

Review URL: https://chromiumcodereview.appspot.com/12319053

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@185504 0039d316-1c4b-4281-b951-d872f2087c98
4 files changed