Implement HTMLMarqueeElement's animation in private scripts

Source/bindings/templates/attributes.cpp

Index: Source/bindings/templates/attributes.cpp
diff --git a/Source/bindings/templates/attributes.cpp b/Source/bindings/templates/attributes.cpp
index e870db8d3ebba3a3228ec98feb5f6baafc03ffcf..fb47f713b7ca83954f0f3c7da0c581842dd71d21 100644
--- a/Source/bindings/templates/attributes.cpp
+++ b/Source/bindings/templates/attributes.cpp
@@ -345,6 +345,7 @@ bool {{v8_class}}::{{attribute.name}}AttributeGetterImplementedInPrivateScript(L
 {
     if (!frame)
         return false;
+    v8::HandleScope handleScope(toIsolate(frame));
     v8::Handle<v8::Context> context = toV8Context(frame, DOMWrapperWorld::privateScriptIsolatedWorld());
     if (context.IsEmpty())
         return false;
@@ -379,6 +380,7 @@ bool {{v8_class}}::{{attribute.name}}AttributeSetterImplementedInPrivateScript(L
 {
     if (!frame)
         return false;
+    v8::HandleScope handleScope(toIsolate(frame));
     v8::Handle<v8::Context> context = toV8Context(frame, DOMWrapperWorld::privateScriptIsolatedWorld());
     if (context.IsEmpty())
         return false;