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

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

 // Copyright (c) 2011, 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 dart2js;
 
 const DONT_KNOW_HOW_TO_FIX = "";
 
 /**
  * The messages in this file should meet the following guide lines:
@@ skipping 581 matching lines @@
 foo(static x) {}
 main() => foo(42);
 """, """
 foo({static x}) {}
 main() => foo(42);
 """, """
 foo([static x]) {}
 main() => foo(42);
 """]);
 
+  static const MessageKind FINAL_FUNCTION_TYPE_PARAMETER = const MessageKind(
+      "Error: A function type parameter can't be declared final.",
+      howToFix: "Try removing 'final'.",
+      examples: const ["""
+foo(final int x(int a)) {}
+main() => foo((y) => 42);
+""", """
+foo({final int x(int a)}) {}
+main() => foo((y) => 42);
+""", """
+foo([final int x(int a)]) {}
+main() => foo((y) => 42);
+"""]);
+
+  static const MessageKind VAR_FUNCTION_TYPE_PARAMETER = const MessageKind(
+      "Error: A function type parameter can't be declared with 'var'.",
+      howToFix: "Try removing 'var'.",
+      examples: const ["""
+foo(var int x(int a)) {}
+main() => foo((y) => 42);
+""", """
+foo({var int x(int a)}) {}
+main() => foo((y) => 42);
+""", """
+foo([var int x(int a)]) {}
+main() => foo((y) => 42);
+"""]);
+
   static const MessageKind CANNOT_INSTANTIATE_TYPE_VARIABLE = const MessageKind(
       "Error: Cannot instantiate type variable '#{typeVariableName}'.");
 
   static const MessageKind CYCLIC_TYPE_VARIABLE = const MessageKind(
       "Warning: Type variable '#{typeVariableName}' is a supertype of itself.");
 
   static const CYCLIC_TYPEDEF = const MessageKind(
       "Error: A typedef can't refer to itself.",
       howToFix: "Try removing all references to '#{typedefName}' "
                 "in the definition of '#{typedefName}'.",
@@ skipping 722 matching lines @@
 
 class CompileTimeConstantError extends Diagnostic {
   CompileTimeConstantError(MessageKind kind, Map arguments, bool terse)
     : super(kind, arguments, terse);
 }
 
 class CompilationError extends Diagnostic {
   CompilationError(MessageKind kind, Map arguments, bool terse)
     : super(kind, arguments, terse);
 }