Fix error in test-heap.cc.

test/cctest/test-decls.cc

 // Copyright 2007-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 93 matching lines @@
 DeclarationContext::DeclarationContext()
     : is_initialized_(false), get_count_(0), set_count_(0), has_count_(0) {
   // Do nothing.
 }
 
 
 void DeclarationContext::InitializeIfNeeded() {
   if (is_initialized_) return;
   HandleScope scope;
   Local<FunctionTemplate> function = FunctionTemplate::New();
-  Local<Value> data = Integer::New(reinterpret_cast<intptr_t>(this));
+  Local<Value> data = External::New(this);
   GetHolder(function)->SetNamedPropertyHandler(&HandleGet,
                                                &HandleSet,
                                                &HandleHas,
                                                0, 0,
                                                data);
   context_ = Context::New(0, function->InstanceTemplate(), Local<Value>());
   context_->Enter();
   is_initialized_ = true;
 }
 
@@ skipping 47 matching lines @@
 
 v8::Handle<Boolean> DeclarationContext::HandleHas(Local<String> key,
                                                   const AccessorInfo& info) {
   DeclarationContext* context = GetInstance(info);
   context->has_count_++;
   return context->Has(key);
 }
 
 
 DeclarationContext* DeclarationContext::GetInstance(const AccessorInfo& info) {
-  Local<Value> data = info.Data();
-  return reinterpret_cast<DeclarationContext*>(Int32::Cast(*data)->Value());
+  return static_cast<DeclarationContext*>(External::Unwrap(info.Data()));
 }
 
 
 v8::Handle<Value> DeclarationContext::Get(Local<String> key) {
   return v8::Handle<Value>();
 }
 
 
 v8::Handle<Value> DeclarationContext::Set(Local<String> key,
                                           Local<Value> value) {
@@ skipping 391 matching lines @@
   HandleScope scope;
 
   { AbsentInPrototypeContext context;
     context.Check("if (false) { var x = 0; }; x",
                   0,
                   0,
                   1,  // declaration
                   EXPECT_RESULT, Undefined());
   }
 }