Finally move the 'to_be_moved' files under webkitpy.

The only ones left are webgl-related, so the dir name is easy :).

R=abarth@chromium.org
BUG=none

Review URL: https://chromiumcodereview.appspot.com/19808005

git-svn-id: svn://svn.chromium.org/blink/trunk@154800 bbb929c8-8fbe-4397-9dbb-9b2b20218538