Remove frame from Code App, replace with dynamic resizing in JS.  Results in being usable in Chrome on file:// URLs.

R=spertus@google.com

Review URL: https://codereview.appspot.com/12960045

git-svn-id: http://blockly.googlecode.com/svn/trunk@1229 c400ca83-b69d-9dd7-9705-49c6b8615e23