Ensure DOMWrapperWorld always exists in all webkit_unit_tests

Source/modules/indexeddb/IDBTransactionTest.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 32 matching lines @@
 
 using namespace WebCore;
 
 using blink::WebIDBDatabase;
 
 namespace {
 
 class IDBTransactionTest : public testing::Test {
 public:
     IDBTransactionTest()
-        : m_handleScope(v8::Isolate::GetCurrent())
-        , m_scope(v8::Context::New(v8::Isolate::GetCurrent()))
+        : m_scope(V8BindingTestScope::create(v8::Isolate::GetCurrent()))
         , m_document(Document::create())
     {
     }
 
     ExecutionContext* executionContext()
     {
         return m_document.get();
     }
 
 private:
-    v8::HandleScope m_handleScope;
-    v8::Context::Scope m_scope;
+    OwnPtr<V8BindingTestScope> m_scope;
     RefPtr<Document> m_document;
 };
 
 class FakeWebIDBDatabase FINAL : public blink::WebIDBDatabase {
 public:
     static PassOwnPtr<FakeWebIDBDatabase> create() { return adoptPtr(new FakeWebIDBDatabase()); }
 
     virtual void commit(long long transactionId) OVERRIDE { }
     virtual void abort(long long transactionId) OVERRIDE { }
     virtual void close() OVERRIDE { }
@@ skipping 69 matching lines @@
 
     // Fire an abort to make sure this doesn't free the transaction during use. The test
     // will not fail if it is, but ASAN would notice the error.
     db->onAbort(transactionId, DOMError::create(AbortError, "Aborted"));
 
     // onAbort() should have cleared the transaction's reference to the database.
     EXPECT_EQ(1, db->refCount());
 }
 
 } // namespace