[binding] Replace [CustomIndexedGetter] attributes with [Custom] getter

Source/core/html/HTMLEmbedElement.idl

Index: Source/core/html/HTMLEmbedElement.idl
diff --git a/Source/core/html/HTMLEmbedElement.idl b/Source/core/html/HTMLEmbedElement.idl
index d47944967c53898f601591f1677eaf356f2551f5..8a6b945e1ffa3149d88fcb62bb3b4819d42c5cc7 100644
--- a/Source/core/html/HTMLEmbedElement.idl
+++ b/Source/core/html/HTMLEmbedElement.idl
@@ -19,11 +19,7 @@
  */
 
 [
-    CustomNamedGetter,
-    CustomNamedSetter,
     CustomLegacyCall,
-    CustomIndexedGetter,
-    CustomIndexedSetter
 ] interface HTMLEmbedElement : HTMLElement {
 [Reflect] attribute DOMString align;
 [Reflect] attribute DOMString height;
@@ -31,6 +27,10 @@
 [Reflect, URL] attribute DOMString src;
 [Reflect] attribute DOMString type;
 [Reflect] attribute DOMString width;
+[Custom] getter boolean (unsigned long index);
+[Custom] setter boolean (unsigned long index, Node value);
+[Custom] getter Node (DOMString name);
+[Custom] setter Node (DOMString name, Node value);
 
 #if defined(ENABLE_SVG) && ENABLE_SVG
 [CheckSecurityForNode, RaisesException] SVGDocument getSVGDocument();