Inline CreateClassMirror and remove dead code.

(Almost) no more embedding API, yay!

Fixes issue 12135.

R=asiva@google.com

Review URL: https://codereview.chromium.org//21440002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@25717 260f80e4-7a28-3924-810f-c04153c831b5
3 files changed