Implement reflected attributes of HTMLMarqueeElement in Blink-in-JS

Source/bindings/templates/attributes.cpp

 {##############################################################################}
 {% macro attribute_getter(attribute, world_suffix) %}
 {% filter conditional(attribute.conditional_string) %}
 static void {{attribute.name}}AttributeGetter{{world_suffix}}(
 {%- if attribute.is_expose_js_accessors %}
 const v8::FunctionCallbackInfo<v8::Value>& info
 {%- else %}
 const v8::PropertyCallbackInfo<v8::Value>& info
 {%- endif %})
 {
-    {% if attribute.is_reflect and not attribute.is_url and
-          attribute.idl_type == 'DOMString' and is_node %}
+    {% if attribute.is_reflect and not attribute.is_url
+          and attribute.idl_type == 'DOMString' and is_node
+          and not attribute.is_implemented_in_private_script %}
     {% set cpp_class, v8_class = 'Element', 'V8Element' %}
     {% endif %}
     {# holder #}
     {% if not attribute.is_static %}
     v8::Handle<v8::Object> holder = info.Holder();
     {% endif %}
     {# impl #}
     {% if attribute.cached_attribute_validation_method %}
     v8::Handle<v8::String> propertyName = v8AtomicString(info.GetIsolate(), "{{attribute.name}}");
     {{cpp_class}}* impl = {{v8_class}}::toNative(holder);
@@ skipping 171 matching lines @@
 {##############################################################################}
 {% macro attribute_setter(attribute, world_suffix) %}
 {% filter conditional(attribute.conditional_string) %}
 static void {{attribute.name}}AttributeSetter{{world_suffix}}(
 {%- if attribute.is_expose_js_accessors %}
 v8::Local<v8::Value> v8Value, const v8::FunctionCallbackInfo<v8::Value>& info
 {%- else %}
 v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info
 {%- endif %})
 {
-    {% if attribute.is_reflect and attribute.idl_type == 'DOMString' and
-          is_node %}
+    {% if attribute.is_reflect and attribute.idl_type == 'DOMString'
+          and is_node and not attribute.is_implemented_in_private_script %}
     {% set cpp_class, v8_class = 'Element', 'V8Element' %}
     {% endif %}
     {# Local variables #}
     {% if not attribute.is_static %}
     v8::Handle<v8::Object> holder = info.Holder();
     {% endif %}
     {% if attribute.has_setter_exception_state %}
     ExceptionState exceptionState(ExceptionState::SetterContext, "{{attribute.name}}", "{{interface_name}}", holder, info.GetIsolate());
     {% endif %}
     {# Type checking #}
@@ skipping 179 matching lines @@
     if (block.HasCaught()) {
         if (!PrivateScriptRunner::throwDOMExceptionInPrivateScriptIfNeeded(scriptState->isolate(), exceptionState, block.Exception())) {
             // FIXME: We should support exceptions other than DOM exceptions.
             RELEASE_ASSERT_NOT_REACHED();
         }
         return false;
     }
     return true;
 }
 {% endmacro %}