Update popular 25 extensions list

BUG=None
TBR=tonyg@chromium.org

Review URL: https://codereview.chromium.org/123173002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@242792 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 242792