ScriptPromise should understand the ScriptState from which the ScriptPromise is generated

Source/bindings/v8/V8Binding.cpp

Index: Source/bindings/v8/V8Binding.cpp
diff --git a/Source/bindings/v8/V8Binding.cpp b/Source/bindings/v8/V8Binding.cpp
index 812da6ab86fa4072c8dbae8179eb08f5b04163c2..737c564a3e360ccc0049ac13a97f407bb18fdcdc 100644
--- a/Source/bindings/v8/V8Binding.cpp
+++ b/Source/bindings/v8/V8Binding.cpp
@@ -745,4 +745,14 @@ V8ExecutionScope::~V8ExecutionScope()
     m_scriptState->disposePerContextData();
 }
 
+ScriptState* V8ExecutionScope::scriptState() const
+{
+    return m_scriptState.get();
+}
+
+v8::Isolate* V8ExecutionScope::isolate() const
+{
+    return m_scriptState->isolate();
+}
+
 } // namespace WebCore