Ensure DOMWrapperWorld always exists in all webkit_unit_tests

Source/bindings/v8/ScriptPromiseResolverTest.cpp

Index: Source/bindings/v8/ScriptPromiseResolverTest.cpp
diff --git a/Source/bindings/v8/ScriptPromiseResolverTest.cpp b/Source/bindings/v8/ScriptPromiseResolverTest.cpp
index 8ab80f11b5fe46d30270c0eb0d85f56245de3300..0e4d761757f0820e10022a4c81bbad6aacafb3a3 100644
--- a/Source/bindings/v8/ScriptPromiseResolverTest.cpp
+++ b/Source/bindings/v8/ScriptPromiseResolverTest.cpp
@@ -47,16 +47,12 @@ class ScriptPromiseResolverTest : public testing::Test {
 public:
     ScriptPromiseResolverTest()
         : m_isolate(v8::Isolate::GetCurrent())
-        , m_handleScope(m_isolate)
-        , m_context(m_isolate, v8::Context::New(m_isolate))
-        , m_contextScope(m_context.newLocal(m_isolate))
     {
     }
 
     void SetUp()
     {
-        // FIXME: Create a new world and pass it to V8PerContextData.
-        m_perContextData = V8PerContextData::create(m_context.newLocal(m_isolate), 0);
+        m_scope = V8BindingTestScope::create(m_isolate);
         m_promise = ScriptPromise::createPending();
         m_resolver = ScriptPromiseResolver::create(m_promise);
     }
@@ -65,7 +61,7 @@ public:
     {
         m_resolver = nullptr;
         m_promise.clear();
-        m_perContextData.clear();
+        m_scope.clear();
     }
 
     V8PromiseCustom::PromiseState state()
@@ -86,12 +82,10 @@ public:
 
 protected:
     v8::Isolate* m_isolate;
-    v8::HandleScope m_handleScope;
-    ScopedPersistent<v8::Context> m_context;
-    v8::Context::Scope m_contextScope;
     RefPtr<ScriptPromiseResolver> m_resolver;
     ScriptPromise m_promise;
-    OwnPtr<V8PerContextData> m_perContextData;
+private:
+    OwnPtr<V8BindingTestScope> m_scope;
 };
 
 TEST_F(ScriptPromiseResolverTest, initialState)