Change resolving of instance methods to check early for name mismatch.

runtime/lib/invocation_mirror.cc

 // 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.
 
 #include "vm/bootstrap_natives.h"
 
 #include "vm/compiler.h"
 #include "vm/dart_entry.h"
 #include "vm/exceptions.h"
 #include "vm/native_entry.h"
@@ skipping 17 matching lines @@
   Object& arg = Object::Handle();
   for (int i = 1; i < num_arguments; i++) {
     arg = fun_arguments.At(i);
     invoke_arguments.SetAt(i, arg);
   }
   // Resolve dynamic function given by name.
   const ArgumentsDescriptor args_desc(fun_args_desc);
   const Function& function = Function::Handle(
       Resolver::ResolveDynamic(receiver,
                                fun_name,
-                               args_desc.Count(),
-                               args_desc.NamedCount()));
+                               args_desc));
   Object& result = Object::Handle();
   if (function.IsNull()) {
     result = DartEntry::InvokeNoSuchMethod(receiver,
                                            fun_name,
                                            invoke_arguments,
                                            fun_args_desc);
   } else {
     result = DartEntry::InvokeFunction(function,
                                        invoke_arguments,
                                        fun_args_desc);
   }
   if (result.IsError()) {
     Exceptions::PropagateError(Error::Cast(result));
   }
   return result.raw();
 }
 
 }  // namespace dart