Fix the layers watchlist

The layers watchlist was pointing at stale paths. This CL updates them.

R=enne@chromium.org
BUG=None

Review URL: https://chromiumcodereview.appspot.com/22877028

git-svn-id: svn://svn.chromium.org/blink/trunk@156322 bbb929c8-8fbe-4397-9dbb-9b2b20218538