Implement JS_INTERCEPTOR_CONSTANT

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 1282 matching lines @@
       examples: const [
           "main();"]);
 
   static const MessageKind MIRROR_BLOAT = const MessageKind(
       "Hint: #{count} methods retained for use by dart:mirrors out of #{total}"
       " total methods (#{percentage}%).");
 
   static const MessageKind MIRROR_IMPORT = const MessageKind(
       "Info: Import of 'dart:mirrors'.");
 
+  static const MessageKind WRONG_ARGUMENT_FOR_JS_INTERCEPTOR_CONSTANT =
+      const MessageKind(
+      "Error: Argument for 'JS_INTERCEPTOR_CONSTANT' must be a type constant.");
+
   static const MessageKind COMPILER_CRASHED = const MessageKind(
       "Error: The compiler crashed when compiling this element.");
 
   static const MessageKind PLEASE_REPORT_THE_CRASH = const MessageKind('''
 The compiler is broken.
 
 When compiling the above element, the compiler crashed. It is not
 possible to tell if this is caused by a problem in your program or
 not. Regardless, the compiler should not crash.
 
@@ skipping 215 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);
 }