Removed handle creation and inlined two field index checks

runtime/vm/object.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_OBJECT_H_
 #define VM_OBJECT_H_
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/utils.h"
@@ skipping 3090 matching lines @@
   RawType* GetType() const;
 
   virtual RawAbstractTypeArguments* GetTypeArguments() const;
   virtual void SetTypeArguments(const AbstractTypeArguments& value) const;
 
   // Check if the type of this instance is a subtype of the given type.
   bool IsInstanceOf(const AbstractType& type,
                     const AbstractTypeArguments& type_instantiator,
                     Error* malformed_error) const;
 
-  bool IsValidNativeIndex(int index) const;
+  bool IsValidNativeIndex(int index) const {
+    return ((index >= 0) && (index < clazz()->ptr()->num_native_fields_));
+  }
 
   intptr_t GetNativeField(int index) const {
     return *NativeFieldAddr(index);
   }
 
   void SetNativeField(int index, intptr_t value) const {
     *NativeFieldAddr(index) = value;
   }
 
   static intptr_t InstanceSize() {
@@ skipping 2431 matching lines @@
     if (this->CharAt(i) != str.CharAt(begin_index + i)) {
       return false;
     }
   }
   return true;
 }
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_H_