Sync CSS interfaces with the specs

Source/core/css/CSS.idl

Index: Source/core/css/CSS.idl
diff --git a/Source/core/css/CSS.idl b/Source/core/css/CSS.idl
index 36fe6dacce8566050245249f5c1bce329227202a..9893b7dc09eb2246d2f120dde9ccabc7ca4e2bc6 100644
--- a/Source/core/css/CSS.idl
+++ b/Source/core/css/CSS.idl
@@ -27,11 +27,14 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
+// http://dev.w3.org/csswg/css-conditional/#the-css-interface
+
 [
     NoInterfaceObject,
     ImplementedAs=DOMWindowCSS,
     WillBeGarbageCollected
 ] interface CSS {
+    // TODO(philipj): The supports() methods should be static.
     boolean supports(DOMString property, DOMString value);
     boolean supports(DOMString conditionText);
 };