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This is part 2 of the cleanup described in the attached bug.
Also, added sreeram to c/b/ui/search/OWNERS and dhollowa to c/b/instant/OWNERS.

BUG=179184


Review URL: https://chromiumcodereview.appspot.com/12520005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@188656 0039d316-1c4b-4281-b951-d872f2087c98