Use entities in js_emitter/model.dart

pkg/compiler/lib/src/js_emitter/full_emitter/emitter.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.
 
 library dart2js.js_emitter.full_emitter;
 
 import 'dart:collection' show HashMap;
 import 'dart:convert';
 
 import 'package:js_runtime/shared/embedded_names.dart' as embeddedNames;
@@ skipping 601 matching lines @@
         classEmitter.emitClass(cls, enclosingBuilder, fragment);
       }
     });
   }
 
   void assembleStaticFunctions(
       Iterable<Method> staticFunctions, Fragment fragment) {
     if (staticFunctions == null) return;
 
     for (Method method in staticFunctions) {
-      Element element = method.element;
+      MethodElement element = method.element;
       // We need to filter out null-elements for the interceptors.
       // TODO(floitsch): use the precomputed interceptors here.
       if (element == null) continue;
       ClassBuilder builder = new ClassBuilder.forStatics(element, namer);
       containerBuilder.addMemberMethod(method, builder);
       getElementDescriptor(element, fragment)
           .properties
           .addAll(builder.properties);
     }
   }
@@ skipping 1551 matching lines @@
     if (cachedElements.isEmpty) return;
     for (Element element in backend.codegenEnqueuer.newlyEnqueuedElements) {
       if (element.isInstanceMember) {
         cachedClassBuilders.remove(element.enclosingClass);
 
         nativeEmitter.cachedBuilders.remove(element.enclosingClass);
       }
     }
   }
 }