Emit a compile-time error if a function type parameter is declard with 'final' or 'var'.

sdk/lib/_internal/compiler/implementation/resolution/members.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of resolution;
 
 abstract class TreeElements {
   Element get currentElement;
   Set<Node> get superUses;
 
@@ skipping 4109 matching lines @@
     if (!defaultValuesAllowed) {
       error(defaultValue, MessageKind.TYPEDEF_FORMAL_WITH_DEFAULT);
     }
     // Visit the value. The compile time constant handler will
     // make sure it's a compile time constant.
     resolveExpression(defaultValue);
     return element;
   }
 
   Element visitFunctionExpression(FunctionExpression node) {
+    Modifiers modifiers = currentDefinitions.modifiers;
+    if (modifiers.isFinal()) {
+      compiler.reportError(modifiers,
+          MessageKind.FINAL_FUNCTION_TYPE_PARAMETER);
+    }
+    if (modifiers.isVar()) {
+      compiler.reportError(modifiers, MessageKind.VAR_FUNCTION_TYPE_PARAMETER);
+    }
     // This is a function typed parameter.
     // TODO(ahe): Resolve the function type.
     return visit(node.name);
   }
 
   LinkBuilder<Element> analyzeNodes(Link<Node> link) {
     LinkBuilder<Element> elements = new LinkBuilder<Element>();
     for (; !link.isEmpty; link = link.tail) {
       Element element = link.head.accept(this);
       if (element != null) {
@@ skipping 242 matching lines @@
     return e;
   }
 
   /// Assumed to be called by [resolveRedirectingFactory].
   Element visitReturn(Return node) {
     Node expression = node.expression;
     return finishConstructorReference(visit(expression),
                                       expression, expression);
   }
 }