Removed handle creation and inlined two field index checks

runtime/vm/object.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/object.h"
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/bigint_operations.h"
@@ skipping 8196 matching lines @@
         !other_type_arguments.IsInstantiated()) {
       other_type_arguments =
           other_type_arguments.InstantiateFrom(other_instantiator);
     }
   }
   return cls.IsSubtypeOf(type_arguments, other_class, other_type_arguments,
                          malformed_error);
 }
 
 
-bool Instance::IsValidNativeIndex(int index) const {
-  const Class& cls = Class::Handle(clazz());
-  return (index >= 0 && index < cls.num_native_fields());
-}
-
-
 RawInstance* Instance::New(const Class& cls, Heap::Space space) {
   Instance& result = Instance::Handle();
   {
     intptr_t instance_size = cls.instance_size();
     ASSERT(instance_size > 0);
     RawObject* raw = Object::Allocate(cls.id(), instance_size, space);
     NoGCScope no_gc;
     result ^= raw;
     uword addr = reinterpret_cast<uword>(result.raw_ptr());
     // Initialize fields.
@@ skipping 2963 matching lines @@
   }
   return result.raw();
 }
 
 
 const char* WeakProperty::ToCString() const {
   return "_WeakProperty";
 }
 
 }  // namespace dart