Sync CSS interfaces with the specs

Source/core/css/CSSImportRule.idl

Index: Source/core/css/CSSImportRule.idl
diff --git a/Source/core/css/CSSImportRule.idl b/Source/core/css/CSSImportRule.idl
index f56ef9fc0f191758bdd91d15b4361b46dc2a22c2..e845ca26845b98a83f65af79b8a928e0c4bc1d2c 100644
--- a/Source/core/css/CSSImportRule.idl
+++ b/Source/core/css/CSSImportRule.idl
@@ -18,10 +18,11 @@
  * Boston, MA 02110-1301, USA.
  */
 
-// Introduced in DOM Level 2:
+// http://dev.w3.org/csswg/cssom/#the-cssimportrule-interface
+
 interface CSSImportRule : CSSRule {
-    readonly attribute DOMString? href;
-    readonly attribute MediaList media;
-    readonly attribute CSSStyleSheet styleSheet;
+    readonly attribute DOMString href;
+    // TODO(philipj): media should have [PutForwards=mediaText].
+    [SameObject] readonly attribute MediaList media;
+    [SameObject] readonly attribute CSSStyleSheet styleSheet;
 };
-