Sync HTML element interfaces S-V with the spec

Source/core/html/HTMLTableRowElement.idl

Index: Source/core/html/HTMLTableRowElement.idl
diff --git a/Source/core/html/HTMLTableRowElement.idl b/Source/core/html/HTMLTableRowElement.idl
index 1f06529465600a0fedfd35d1657c61524ef97ac8..d2b59dec89e82db14cd9752e0319d3753aaf2de3 100644
--- a/Source/core/html/HTMLTableRowElement.idl
+++ b/Source/core/html/HTMLTableRowElement.idl
@@ -18,15 +18,22 @@
  * Boston, MA 02110-1301, USA.
  */
 
+// https://html.spec.whatwg.org/#the-tr-element
+
 interface HTMLTableRowElement : HTMLElement {
     readonly attribute long rowIndex;
     readonly attribute long sectionRowIndex;
     readonly attribute HTMLCollection cells;
+    [RaisesException] HTMLElement insertCell(optional long index = -1);
+    // TODO(philipj): The index argument should not be optional.
+    [RaisesException] void deleteCell([Default=Undefined] optional long index);
+
+    // obsolete members
+    // https://html.spec.whatwg.org/#HTMLTableRowElement-partial
     [Reflect] attribute DOMString align;
-    [Reflect, TreatNullAs=EmptyString] attribute DOMString bgColor;
     [Reflect=char] attribute DOMString ch;
     [Reflect=charoff] attribute DOMString chOff;
     [Reflect] attribute DOMString vAlign;
-    [RaisesException] HTMLElement insertCell(optional long index = -1);
-    [RaisesException] void deleteCell([Default=Undefined] optional long index);
+
+    [Reflect, TreatNullAs=EmptyString] attribute DOMString bgColor;
 };