Fix for issues 2380 and 2381

compiler/java/com/google/dart/compiler/resolver/Resolver.java

Index: compiler/java/com/google/dart/compiler/resolver/Resolver.java
===================================================================
--- compiler/java/com/google/dart/compiler/resolver/Resolver.java	(revision 8249)
+++ compiler/java/com/google/dart/compiler/resolver/Resolver.java	(working copy)
@@ -224,6 +224,23 @@
     public Element visitFunctionTypeAlias(DartFunctionTypeAlias alias) {
       getContext().pushFunctionAliasScope(alias);
       resolveFunctionAlias(alias);
+
+      List<DartParameter> parameters = alias.getParameters();
+      for (DartParameter parameter : parameters) {
+        assert parameter.getElement() != null;
+        if (parameter.getQualifier() instanceof DartThisExpression) {

[zundel, 2012/06/04 19:23:18]

There is also the case 'super'.  In fact, I'm not sure if any qualifier is valid
for the name of a parameter.

[Brian Wilkerson, 2012/06/04 19:32:39]

No, it isn't. But as far as I can see the parser won't create any other
qualified names for parameters (see DartParser.parseParameterName()).

+          onError(parameter.getName(), ResolverErrorCode.PARAMETER_INIT_OUTSIDE_CONSTRUCTOR);
+        } else {
+            getContext().declare(
+                parameter.getElement(),
+                ResolverErrorCode.DUPLICATE_PARAMETER,
+                ResolverErrorCode.DUPLICATE_PARAMETER_WARNING);
+        }
+        if (parameter.getDefaultExpr() != null) {
+          onError(parameter.getDefaultExpr(), ResolverErrorCode.DEFAULT_VALUE_IN_TYPEDEF);
+        }
+      }
+
       getContext().popScope();
       return null;
     }