Support basic immutable CSSOM

components/script/dom/cssgroupingrule.rs

@@ -0,0 +1,30 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+use dom::bindings::codegen::Bindings::CSSGroupingRuleBinding;
+use dom::bindings::js::Root;
+use dom::bindings::reflector::reflect_dom_object;
+use dom::cssrule::CSSRule;
+use dom::cssstylesheet::CSSStyleSheet;
+use dom::window::Window;
+
+#[dom_struct]
+pub struct CSSGroupingRule {
+    cssrule: CSSRule,
+}
+
+impl CSSGroupingRule {
+    pub fn new_inherited(parent: &CSSStyleSheet) -> CSSGroupingRule {
+        CSSGroupingRule {
+            cssrule: CSSRule::new_inherited(parent),
+        }
+    }
+
+    #[allow(unrooted_must_root)]
+    pub fn new(window: &Window, parent: &CSSStyleSheet) -> Root<CSSGroupingRule> {
+        reflect_dom_object(box CSSGroupingRule::new_inherited(parent),
+                           window,
+                           CSSGroupingRuleBinding::Wrap)
+    }
+}