Fixes slow object pool search on x64.

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 319 matching lines @@
 
   static Object& ZoneHandle() {
     return ZoneHandle(Isolate::Current(), null_);
   }
 
   static Object& ZoneHandle(RawObject* raw_ptr) {
     return ZoneHandle(Isolate::Current(), raw_ptr);
   }
 
   static RawObject* null() { return null_; }
+
   static const Object& null_object() {
     ASSERT(null_object_ != NULL);
     return *null_object_;
   }
   static const Array& null_array() {
     ASSERT(null_array_ != NULL);
     return *null_array_;
   }
   static const String& null_string() {
     ASSERT(null_string_ != NULL);
     return *null_string_;
   }
   static const Instance& null_instance() {
     ASSERT(null_instance_ != NULL);
     return *null_instance_;
   }
   static const AbstractTypeArguments& null_abstract_type_arguments() {
     ASSERT(null_abstract_type_arguments_ != NULL);
     return *null_abstract_type_arguments_;
   }
+
   static const Array& empty_array() {
     ASSERT(empty_array_ != NULL);
     return *empty_array_;
   }
 
   // The sentinel is a value that cannot be produced by Dart code.
   // It can be used to mark special values, for example to distinguish
   // "uninitialized" fields.
   static const Instance& sentinel() {
     ASSERT(sentinel_ != NULL);
@@ skipping 5788 matching lines @@
 
 
 RawObject* MegamorphicCache::GetTargetFunction(const Array& array,
                                                intptr_t index) {
   return array.At((index * kEntryLength) + kTargetFunctionIndex);
 }
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_H_