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

Source/bindings/v8/V8CustomElementLifecycleCallbacks.cpp

 /*
  * Copyright (C) 2013 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:
  *
  *     * 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
@@ skipping 200 matching lines @@
 
     v8::Handle<v8::Object> receiver = toV8(element, context->Global(), isolate).As<v8::Object>();
     ASSERT(!receiver.IsEmpty());
 
     v8::Handle<v8::Function> callback = m_attributeChanged.newLocal(isolate);
     if (callback.IsEmpty())
         return;
 
     v8::Handle<v8::Value> argv[] = {
         v8String(name, isolate),
-        oldValue.isNull() ? v8::Handle<v8::Value>(v8::Null()) : v8::Handle<v8::Value>(v8String(oldValue, isolate)),
-        newValue.isNull() ? v8::Handle<v8::Value>(v8::Null()) : v8::Handle<v8::Value>(v8String(newValue, isolate))
+        oldValue.isNull() ? v8::Handle<v8::Value>(v8::Null(isolate)) : v8::Handle<v8::Value>(v8String(oldValue, isolate)),
+        newValue.isNull() ? v8::Handle<v8::Value>(v8::Null(isolate)) : v8::Handle<v8::Value>(v8String(newValue, isolate))
     };
 
     v8::TryCatch exceptionCatcher;
     exceptionCatcher.SetVerbose(true);
     ScriptController::callFunctionWithInstrumentation(scriptExecutionContext(), callback, receiver, WTF_ARRAY_LENGTH(argv), argv, isolate);
 }
 
 void V8CustomElementLifecycleCallbacks::call(const ScopedPersistent<v8::Function>& weakCallback, Element* element)
 {
     if (!canInvokeCallback())
@@ skipping 13 matching lines @@
 
     v8::Handle<v8::Object> receiver = toV8(element, context->Global(), isolate).As<v8::Object>();
     ASSERT(!receiver.IsEmpty());
 
     v8::TryCatch exceptionCatcher;
     exceptionCatcher.SetVerbose(true);
     ScriptController::callFunctionWithInstrumentation(scriptExecutionContext(), callback, receiver, 0, 0, isolate);
 }
 
 } // namespace WebCore