Pass isolate to v8::Null() function when possible

Source/bindings/v8/V8PerIsolateData.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 56 matching lines @@
 void V8PerIsolateData::ensureInitialized(v8::Isolate* isolate)
 {
     ASSERT(isolate);
     if (!isolate->GetData())
         create(isolate);
 }
 
 v8::Persistent<v8::Value>& V8PerIsolateData::ensureLiveRoot()
 {
     if (m_liveRoot.isEmpty())
-        m_liveRoot.set(m_isolate, v8::Null());
+        m_liveRoot.set(m_isolate, v8::Null(m_isolate));
     return m_liveRoot.getUnsafe();
 }
 
 void V8PerIsolateData::dispose(v8::Isolate* isolate)
 {
     void* data = isolate->GetData();
     delete static_cast<V8PerIsolateData*>(data);
     isolate->SetData(0);
 }
 
@@ skipping 73 matching lines @@
     // obscure and unlikely to be a problem.
     v8::Handle<v8::Value> value = args.Callee()->Get(v8::String::NewSymbol("toString"));
     if (!value->IsFunction()) {
         v8SetReturnValue(args, v8::String::Empty(args.GetIsolate()));
         return;
     }
     v8SetReturnValue(args, V8ScriptRunner::callInternalFunction(v8::Handle<v8::Function>::Cast(value), args.This(), 0, 0, v8::Isolate::GetCurrent()));
 }
 
 } // namespace WebCore