Ensure DOMWrapperWorld always exists in all webkit_unit_tests

Source/bindings/v8/IDBBindingUtilitiesTest.cpp

 /*
  * Copyright (C) 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:
  *
  * 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
@@ skipping 75 matching lines @@
 {
     RefPtr<IDBKey> idbKey = checkKeyFromValueAndKeyPathInternal(value, keyPath);
     ASSERT_TRUE(idbKey.get());
     ASSERT_EQ(IDBKey::NumberType, idbKey->type());
     ASSERT_TRUE(expected == idbKey->number());
 }
 
 class IDBKeyFromValueAndKeyPathTest : public testing::Test {
 public:
     IDBKeyFromValueAndKeyPathTest()
-        : m_handleScope(v8::Isolate::GetCurrent())
-        , m_scope(v8::Context::New(v8::Isolate::GetCurrent()))
+        : m_scope(V8BindingTestScope::create(v8::Isolate::GetCurrent()))
     {
     }
-
 private:
-    v8::HandleScope m_handleScope;
-    v8::Context::Scope m_scope;
+    OwnPtr<V8BindingTestScope> m_scope;
 };
 
 TEST_F(IDBKeyFromValueAndKeyPathTest, TopLevelPropertyStringValue)
 {
     v8::Isolate* isolate = v8::Isolate::GetCurrent();
     v8::Local<v8::Object> object = v8::Object::New(isolate);
     object->Set(v8AtomicString(isolate, "foo"), v8AtomicString(isolate, "zoo"));
 
     ScriptValue scriptValue(object, isolate);
 
@@ skipping 57 matching lines @@
     checkInjection(IDBKey::createDate(4567), scriptObject, "foo.baz");
     checkInjection(IDBKey::createDate(4567), scriptObject, "bar");
     checkInjection(IDBKey::createArray(IDBKey::KeyArray()), scriptObject, "foo.baz");
     checkInjection(IDBKey::createArray(IDBKey::KeyArray()), scriptObject, "bar");
 
     checkInjectionFails(IDBKey::createString("zoo"), scriptObject, "foo.bar.baz");
     checkInjection(IDBKey::createString("zoo"), scriptObject, "foo.xyz.foo");
 }
 
 } // namespace