Switch dart2js 'typedef name = mixinApplication' to 'class name = mixinApplication'.

sdk/lib/_internal/compiler/implementation/warnings.dart

Index: sdk/lib/_internal/compiler/implementation/warnings.dart
diff --git a/sdk/lib/_internal/compiler/implementation/warnings.dart b/sdk/lib/_internal/compiler/implementation/warnings.dart
index 554a3bc81ec599759633fe2df8b40b75686cdb51..345b52b340c4bb5150287d6200f48b8d1c297878 100644
--- a/sdk/lib/_internal/compiler/implementation/warnings.dart
+++ b/sdk/lib/_internal/compiler/implementation/warnings.dart
@@ -1031,6 +1031,11 @@ Error: '#{value}' is not a valid Symbol name because is not:
       "Error: No expression after 'throw'. "
       "Did you mean 'rethrow'?");
 
+  static const MessageKind DEPRECATED_TYPEDEF_MIXIN_SYNTAX = const MessageKind(
+      "Warning: 'typedef' keyword in mixin applications "
+      "was deprecated, replaced with 'class'.",

[ahe, 2013/10/10 11:30:15]

I think this would be enough: "Warning: 'typedef' not allowed here."

[aam-me, 2013/10/11 03:02:06]

Done.

+      howToFix: "Try replacing 'typedef' with 'class'.");

[ahe, 2013/10/10 11:30:15]

Can you add an example as well?

[aam-me, 2013/10/11 03:02:06]

Done.

Very cool message_kind_test.dart test. But I spent more time on getting the
example pass through that test than I expected because  in
compiler\implementation\resolution\members.dart:3693 I did not have
".message()" method invocation on MessageKind.DEPRECATED_TYPEDEF_MIXIN_SYNTAX.
MessageKind.toString() method returns just metadata without howToFix part. That
resulted in missing howToFix part in diagnostic message. Is that as intended? I
see there are a lot of diagnostic in members.dart, that doesn't use message()
method on MessageKind instances neither.

+
   static const MessageKind MIRRORS_EXPECTED_STRING = const MessageKind(
       "Hint: Can't use '#{name}' here because it's an instance of '#{type}' "
       "and a 'String' value is expected.",