Fix a pretty bad bug of a class inheriting a patched class. The fix is

sdk/lib/_internal/compiler/implementation/elements/elements.dart

Index: sdk/lib/_internal/compiler/implementation/elements/elements.dart
===================================================================
--- sdk/lib/_internal/compiler/implementation/elements/elements.dart	(revision 22929)
+++ sdk/lib/_internal/compiler/implementation/elements/elements.dart	(working copy)
@@ -847,11 +847,10 @@
 
   void forEachMember(void f(ClassElement enclosingClass, Element member),
                      {includeBackendMembers: false,
-                      includeSuperMembers: false});
+                      includeSuperAndInjectedMembers: false});
 
   void forEachInstanceField(void f(ClassElement enclosingClass, Element field),
-                            {includeBackendMembers: false,
-                             includeSuperMembers: false});
+                            {includeSuperAndInjectedMembers: false});
 
   void forEachBackendMember(void f(Element member));
 }