Patch refactoring.

lib/compiler/implementation/js_backend/emitter.dart

Index: lib/compiler/implementation/js_backend/emitter.dart
diff --git a/lib/compiler/implementation/js_backend/emitter.dart b/lib/compiler/implementation/js_backend/emitter.dart
index 9b390a3d9259479a87b1c1dd972acc8140f58c9d..359a9a0a89d94f01d26dff58649d64047697a291 100644
--- a/lib/compiler/implementation/js_backend/emitter.dart
+++ b/lib/compiler/implementation/js_backend/emitter.dart
@@ -639,7 +639,8 @@ function(prototype, staticName, fieldName, getterName, lazyValue) {
     classElement.forEachInstanceField(
         addField,
         includeBackendMembers: true,
-        includeSuperMembers: isInstantiated && !classElement.isNative());
+        includeSuperMembers: isInstantiated && !classElement.isNative(),
+        includeInjectedMembers: true);
     return checkedSetters;
   }
 
@@ -662,6 +663,7 @@ function(prototype, staticName, fieldName, getterName, lazyValue) {
     }
 
     classElement.forEachMember(includeBackendMembers: true,
+                               includeInjectedMembers: true,
                                f: (ClassElement enclosing, Element member) {
       assert(invariant(classElement, member.isDeclaration));
       if (member.isInstanceMember()) {