Use NewScriptState in MIDIAccessResolver, CustomElementLifecycleCallbacks and V8MutationCallbacks

Source/bindings/v8/V8MutationCallback.cpp

Index: Source/bindings/v8/V8MutationCallback.cpp
diff --git a/Source/bindings/v8/V8MutationCallback.cpp b/Source/bindings/v8/V8MutationCallback.cpp
index d6110f8d15fe85d21aaf81a807fa2c84002ae3f3..1f0ce99dbd5a702784b343db3ff5d83cad07f1f5 100644
--- a/Source/bindings/v8/V8MutationCallback.cpp
+++ b/Source/bindings/v8/V8MutationCallback.cpp
@@ -39,10 +39,9 @@ namespace WebCore {
 V8MutationCallback::V8MutationCallback(v8::Handle<v8::Function> callback, ExecutionContext* context, v8::Handle<v8::Object> owner, v8::Isolate* isolate)
     : ActiveDOMCallback(context)
     , m_callback(isolate, callback)
-    , m_world(DOMWrapperWorld::current(isolate))
-    , m_isolate(isolate)
+    , m_scriptState(NewScriptState::current(isolate))
 {
-    V8HiddenValue::setHiddenValue(m_isolate, owner, V8HiddenValue::callback(m_isolate), callback);
+    V8HiddenValue::setHiddenValue(isolate, owner, V8HiddenValue::callback(isolate), callback);
     m_callback.setWeak(this, &setWeakCallback);
 }
 
@@ -51,19 +50,20 @@ void V8MutationCallback::call(const Vector<RefPtr<MutationRecord> >& mutations,
     if (!canInvokeCallback())
         return;
 
-    v8::HandleScope handleScope(m_isolate);
+    v8::Isolate* isolate = m_scriptState->isolate();
+    v8::HandleScope handleScope(isolate);
 
-    v8::Handle<v8::Context> v8Context = toV8Context(executionContext(), *m_world);
+    v8::Handle<v8::Context> v8Context = m_scriptState->context();
     if (v8Context.IsEmpty())
         return;
 
     v8::Context::Scope scope(v8Context);
 
-    v8::Handle<v8::Function> callback = m_callback.newLocal(m_isolate);
+    v8::Handle<v8::Function> callback = m_callback.newLocal(isolate);
     if (callback.IsEmpty())
         return;
 
-    v8::Handle<v8::Value> observerHandle = toV8(observer, v8::Handle<v8::Object>(), m_isolate);
+    v8::Handle<v8::Value> observerHandle = toV8(observer, v8::Handle<v8::Object>(), isolate);
     if (observerHandle.IsEmpty()) {
         if (!isScriptControllerTerminating())
             CRASH();
@@ -74,11 +74,11 @@ void V8MutationCallback::call(const Vector<RefPtr<MutationRecord> >& mutations,
         return;
 
     v8::Handle<v8::Object> thisObject = v8::Handle<v8::Object>::Cast(observerHandle);
-    v8::Handle<v8::Value> argv[] = { v8Array(mutations, m_isolate), observerHandle };
+    v8::Handle<v8::Value> argv[] = { v8Array(mutations, isolate), observerHandle };
 
     v8::TryCatch exceptionCatcher;
     exceptionCatcher.SetVerbose(true);
-    ScriptController::callFunction(executionContext(), callback, thisObject, 2, argv, m_isolate);
+    ScriptController::callFunction(executionContext(), callback, thisObject, 2, argv, isolate);
 }
 
 void V8MutationCallback::setWeakCallback(const v8::WeakCallbackData<v8::Function, V8MutationCallback>& data)