Resubmit fix for Function::Clone() and Field::Clone() to adjust the class owner
of type parameters (issue 18630).
Make sure to clone the parameter type array as well.
Add regression tests.

R=iposva@google.com

Review URL: https://codereview.chromium.org//693693003

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@41474 260f80e4-7a28-3924-810f-c04153c831b5