Add robliao to the Google Now Component Extension OWNERS File

R=vadimt@chromium.org

Review URL: https://codereview.chromium.org/134513004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@244275 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 244275