Const variables handled as final

lib/compiler/implementation/elements/elements.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.
 
 #library('elements');
 
 #import('dart:uri');
 
 #import('../tree/tree.dart');
 #import('../scanner/scannerlib.dart');
@@ skipping 154 matching lines @@
 
   // TODO(johnniwinther): This breaks for libraries (for which enclosing
   // elements are null) and is invalid for top level variable declarations for
   // which the enclosing element is a VariableDeclarations and not a compilation
   // unit.
   bool isTopLevel() {
     return enclosingElement !== null && enclosingElement.isCompilationUnit();
   }
 
   bool isAssignable() {
-    if (modifiers != null && modifiers.isFinal()) return false;
+    if (modifiers != null && modifiers.isFinalOrConst()) return false;
     if (isFunction() || isGenerativeConstructor()) return false;
     return true;
   }
 
   Token position() => null;
 
   Token findMyName(Token token) {
     for (Token t = token; t.kind !== EOF_TOKEN; t = t.next) {
       if (t.value == name) return t;
     }
@@ skipping 1423 matching lines @@
  */
 class MetadataAnnotation {
   /**
    * The compile-time constant which this annotation resolves to.
    * In the mirror system, this would be an object mirror.
    */
   abstract Constant get value();
 
   // TODO(ahe): Add more functionality as needed.
 }