Implement updated method overriding rules in the vm.

runtime/vm/class_finalizer.h

 // Copyright (c) 2012, 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.
 
 #ifndef VM_CLASS_FINALIZER_H_
 #define VM_CLASS_FINALIZER_H_
 
 #include "vm/allocation.h"
 #include "vm/growable_array.h"
 
@@ skipping 58 matching lines @@
 
   // Return false if we still have classes pending to be finalized.
   static bool AllClassesFinalized();
 
   // Return whether class finalization failed.
   // The function returns true if the finalization was successful.
   // If finalization fails, an error message is set in the sticky error field
   // in the object store.
   static bool FinalizePendingClasses();
 
+  // Finalize the types appearing in the declaration of class 'cls', i.e. its
+  // type parameters and their upper bounds, its super type and interfaces.
+  // Note that the fields and functions have not been parsed yet (unless cls
+  // is an anonymous top level class).
   static void FinalizeTypesInClass(const Class& cls);
 
+  // Finalize the class including its fields and functions.
   static void FinalizeClass(const Class& cls);
 
   // Verify that the classes have been properly prefinalized. This is
   // needed during bootstrapping where the classes have been preloaded.
   static void VerifyBootstrapClasses();
 
   // Resolve the type and target of the redirecting factory.
   static void ResolveRedirectingFactory(const Class& cls,
                                         const Function& factory);
 
@@ skipping 43 matching lines @@
   static void ResolveAndFinalizeMemberTypes(const Class& cls);
   static void PrintClassInformation(const Class& cls);
   static void CollectInterfaces(const Class& cls,
                                 const GrowableObjectArray& interfaces);
   static void ReportMalformedType(const Error& prev_error,
                                   const Class& cls,
                                   const Type& type,
                                   const char* format,
                                   va_list args);
   static void ReportError(const Error& error);
-  static void ReportError(const Script& script,
+  static void ReportError(const Error& prev_error,
+                          const Script& script,
                           intptr_t token_index,
-                          const char* format, ...) PRINTF_ATTRIBUTE(3, 4);
+                          const char* format, ...) PRINTF_ATTRIBUTE(4, 5);
   static void ReportError(const char* format, ...) PRINTF_ATTRIBUTE(1, 2);
 
   // Verify implicit offsets recorded in the VM for direct access to fields of
   // Dart instances (e.g: _TypedListView, _ByteDataView).
   static void VerifyImplicitFieldOffsets();
 };
 
 }  // namespace dart
 
 #endif  // VM_CLASS_FINALIZER_H_