Remove CTEC.MIXIN_OF_NON_MIXIN and MIXIN_WITH_NON_CLASS_SUPERCLASS.

Remove CTEC.MIXIN_OF_NON_MIXIN and MIXIN_WITH_NON_CLASS_SUPERCLASS.

I believe these codes are covered by the more specific MIXIN_REFERENCES_SUPER, MIXIN_DECLARES_CONSTRUCTOR and MIXIN_INHERITS_FROM_NOT_OBJECT.

R=brianwilkerson@google.com
BUG=

Committed: https://code.google.com/p/dart/source/detail?r=22626

[Brian Wilkerson, 2013-05-10 22:15:54]

I agree that MIXIN_OF_NON_MIXIN appears to be covered by the more specific
errors you mentioned, but I don't see how MIXIN_WITH_NON_CLASS_SUPERCLASS is (or
should be) covered by them.

[scheglov, 2013-05-11 03:11:02]

On 2013/05/10 22:15:54, Brian Wilkerson wrote:
> I agree that MIXIN_OF_NON_MIXIN appears to be covered by the more specific
> errors you mentioned, but I don't see how MIXIN_WITH_NON_CLASS_SUPERCLASS is
(or
> should be) covered by them.

  OK

int A;
class B {}
class C extends A with B {}

This source produces EXTENDS_NON_CLASS.
So, yes, actually we generate less specific error code than could.
I will make changes to generate MIXIN_WITH_NON_CLASS_SUPERCLASS.

[scheglov, 2013-05-11 05:33:50]

PTAL

[Brian Wilkerson, 2013-05-13 13:37:59]

LGTM

[scheglov, 2013-05-13 15:18:23]

Committed patchset #2 manually as r22626 (presubmit successful).