Add harrym to owners for ash/shelf

BUG=none
TEST=none
TBR=harrym@chromium.org

Review URL: https://codereview.chromium.org/140123004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@246162 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 246162