Sync CSS interfaces with the specs

Source/core/css/CSSStyleRule.idl

Index: Source/core/css/CSSStyleRule.idl
diff --git a/Source/core/css/CSSStyleRule.idl b/Source/core/css/CSSStyleRule.idl
index b5c890f63bb2da8e24caaa5bc81b60ecc433f5eb..c1b29081fc92b66547b9e83b571078b151e15bdd 100644
--- a/Source/core/css/CSSStyleRule.idl
+++ b/Source/core/css/CSSStyleRule.idl
@@ -18,8 +18,10 @@
  * Boston, MA 02110-1301, USA.
  */
 
-// Introduced in DOM Level 2:
+// http://dev.w3.org/csswg/cssom/#the-cssstylerule-interface
+
 interface CSSStyleRule : CSSRule {
     attribute DOMString selectorText;
-    readonly attribute CSSStyleDeclaration style;
+    // TODO(philipj): style should have [PutForwards=cssText].
+    [SameObject] readonly attribute CSSStyleDeclaration style;
 };