Fix toV8 and ExceptionState with empty context.

Source/bindings/v8/V8WindowShell.cpp

 /*
  * Copyright (C) 2008, 2009, 2011 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 320 matching lines @@
     m_document.set(m_isolate, wrapper);
 }
 
 void V8WindowShell::updateDocumentProperty()
 {
     if (!m_world->isMainWorld())
         return;
 
     ScriptState::Scope scope(m_scriptState.get());
     v8::Handle<v8::Context> context = m_scriptState->context();
-    v8::Handle<v8::Value> documentWrapper = toV8(m_frame->document(), v8::Handle<v8::Object>(), context->GetIsolate());
+    v8::Handle<v8::Value> documentWrapper = toV8(m_frame->document(), context->Global(), context->GetIsolate());
     ASSERT(documentWrapper == m_document.newLocal(m_isolate) || m_document.isEmpty());
     if (m_document.isEmpty())
         updateDocumentWrapper(v8::Handle<v8::Object>::Cast(documentWrapper));
     checkDocumentWrapper(m_document.newLocal(m_isolate), m_frame->document());
 
     // If instantiation of the document wrapper fails, clear the cache
     // and let the DOMWindow accessor handle access to the document.
     if (documentWrapper.IsEmpty()) {
         clearDocumentProperty();
         return;
@@ skipping 132 matching lines @@
 
 void V8WindowShell::updateSecurityOrigin(SecurityOrigin* origin)
 {
     ASSERT(m_world->isMainWorld());
     if (!isContextInitialized())
         return;
     setSecurityToken(origin);
 }
 
 } // WebCore