dart2js: register static non final fields in the model.

pkg/compiler/lib/src/js_emitter/registry.dart

 // Copyright (c) 2014, 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.js_emitter.program_builder;
 
 /// Maps [LibraryElement]s to their [Element]s.
 ///
 /// Fundamentally, this class nicely encapsulates a
 /// `Map<LibraryElement, List<Element>>`.
@@ skipping 80 matching lines @@
       result = _deferredLibrariesMap.putIfAbsent(
           targetUnit, () => new LibrariesMap.deferred(targetUnit, name));
     }
     _lastOutputUnit = targetUnit;
     _lastLibrariesMap = result;
     return result;
   }
 
   /// Adds all elements to their respective libraries in the correct
   /// libraries map.
-  void registerElements(OutputUnit outputUnit, List<Element> elements) {
+  void registerElements(OutputUnit outputUnit, Iterable<Element> elements) {
     LibrariesMap targetLibrariesMap = _mapUnitToLibrariesMap(outputUnit);
     for (Element element in Elements.sortedByPosition(elements)) {
       targetLibrariesMap.add(element.library, element);
     }
   }
 
   void registerConstant(OutputUnit outputUnit, ConstantValue constantValue) {
     // We just need to make sure that the target library map is registered.
     // Otherwise a library map that contains only constants is not built.
     _mapUnitToLibrariesMap(outputUnit);
   }
 
   Holder registerHolder(String name) {
     return _holdersMap.putIfAbsent(
         name,
         () => new Holder(name, _holdersMap.length));
   }
 }