Remove StatusArea code from GOM it's dead.

Jim.

R=abarth@chromium.org
BUG=389681

Review URL: https://codereview.chromium.org/356273002

git-svn-id: svn://svn.chromium.org/blink/trunk@177147 bbb929c8-8fbe-4397-9dbb-9b2b20218538