- Merge function lists when patching classes (no more duplicates).

- Merge function lists when patching classes (no more duplicates).
- Report errors when applying a patch with duplicate fields or mismatched parameters.
- Fix bug 4526: Wrong error message when defining an already defined class.
Committed: https://code.google.com/p/dart/source/detail?r=10784

[hausner, 2012-08-15 23:46:10]

Looks correct to me.

[siva, 2012-08-15 23:49:58]

lgtm.

Mathias, it looks politically correct or logically correct?

[hausner, 2012-08-15 23:58:53]

In a Rube Goldberg kind of way it looks to me as if it does the trick :)