Sync HTML element interfaces O-Q with the spec

Source/core/html/HTMLOptionElement.idl

Index: Source/core/html/HTMLOptionElement.idl
diff --git a/Source/core/html/HTMLOptionElement.idl b/Source/core/html/HTMLOptionElement.idl
index d57d72a5a9795026a2c9ee5460591f97974f9c96..4b832a35a4cdd6c45b98fdb54d492264ff09095e 100644
--- a/Source/core/html/HTMLOptionElement.idl
+++ b/Source/core/html/HTMLOptionElement.idl
@@ -18,6 +18,9 @@
  * Boston, MA 02110-1301, USA.
  */
 
+// https://html.spec.whatwg.org/#htmloptionelement
+
+// TODO(philipj): The constructor arguments default values are not per spec.
 [
     NamedConstructor=Option(optional DOMString data = null,
                             optional DOMString value = null,
@@ -27,12 +30,13 @@
     RaisesException=Constructor
 ] interface HTMLOptionElement : HTMLElement {
     [Reflect] attribute boolean disabled;
-    readonly attribute HTMLFormElement form;
+    readonly attribute HTMLFormElement? form;
     attribute DOMString label;
     [Reflect=selected] attribute boolean defaultSelected;
     attribute boolean selected;
     attribute DOMString value;
 
+    // TODO(philipj): The text setter should never throw.
     [RaisesException=Setter] attribute DOMString text;
     readonly attribute long index;
 };