Move computation of method flags into model.

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

Index: pkg/compiler/lib/src/js_emitter/old_emitter/emitter.dart
diff --git a/pkg/compiler/lib/src/js_emitter/old_emitter/emitter.dart b/pkg/compiler/lib/src/js_emitter/old_emitter/emitter.dart
index aaca01c2e28b33b22dfbf32cea97acd92639086b..ec71bd9a839a8284dcf873719b817f9f5c5ae719 100644
--- a/pkg/compiler/lib/src/js_emitter/old_emitter/emitter.dart
+++ b/pkg/compiler/lib/src/js_emitter/old_emitter/emitter.dart
@@ -740,14 +740,14 @@ class OldEmitter implements Emitter {
 
   void emitStaticFunctions(Iterable<Method> staticFunctions) {
     if (staticFunctions == null) return;
-    // We need to filter out null-elements for the interceptors.
-    Iterable<Element> elements = staticFunctions
-        .where((Method method) => method.element != null)
-        .map((Method method) => method.element);
 
-    for (Element element in elements) {
+    for (Method method in staticFunctions) {
+      Element 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(element, namer);
-      containerBuilder.addMember(element, builder);
+      containerBuilder.addMemberMethod(method, builder);
       getElementDescriptor(element).properties.addAll(builder.properties);
     }
   }