Use entities in js_emitter/model.dart

pkg/compiler/lib/src/js_emitter/full_emitter/emitter.dart

Index: pkg/compiler/lib/src/js_emitter/full_emitter/emitter.dart
diff --git a/pkg/compiler/lib/src/js_emitter/full_emitter/emitter.dart b/pkg/compiler/lib/src/js_emitter/full_emitter/emitter.dart
index 0758720e48768b93e5f65563ffbd2cba3b7b9049..caa8f720d705789c088c071a9aa3cb349a75c6e2 100644
--- a/pkg/compiler/lib/src/js_emitter/full_emitter/emitter.dart
+++ b/pkg/compiler/lib/src/js_emitter/full_emitter/emitter.dart
@@ -619,7 +619,7 @@ class Emitter implements js_emitter.Emitter {
     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;