Lazy implementation of final variables.

lib/compiler/implementation/resolver.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.
 
 interface TreeElements {
   Element operator[](Node node);
   Selector getSelector(Send send);
   DartType getType(TypeAnnotation annotation);
 }
 
@@ skipping 175 matching lines @@
       error(node,
             MessageKind.CANNOT_FIND_CONSTRUCTOR2,
             [name, defaultClass.name]);
     }
   }
 
   TreeElements resolveField(Element element) {
     Node tree = element.parseNode(compiler);
     ResolverVisitor visitor = new ResolverVisitor(compiler, element);
     initializerDo(tree, visitor.visit);
+    if (!element.isInstanceMember()) {
+      compiler.enqueuer.resolution.registerStaticUse(
+          compiler.cyclicThrowHelper);
+    }
     return visitor.mapping;
   }
 
   TreeElements resolveParameter(Element element) {
     Node tree = element.parseNode(compiler);
     ResolverVisitor visitor =
         new ResolverVisitor(compiler, element.enclosingElement);
     initializerDo(tree, visitor.visit);
     return visitor.mapping;
   }
@@ skipping 2430 matching lines @@
   TopScope(LibraryElement library) : super(null, library);
   Element lookup(SourceString name) {
     return library.find(name);
   }
 
   Element add(Element newElement) {
     throw "Cannot add an element in the top scope";
   }
   String toString() => '$element';
 }