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

Source/bindings/tests/idls/TestCustomAccessors.idl

Index: Source/bindings/tests/idls/TestCustomAccessors.idl
diff --git a/Source/bindings/tests/idls/TestCustomAccessors.idl b/Source/bindings/tests/idls/TestCustomAccessors.idl
index 964b60a0464f04c7b3515d09fad9f63fe98e5c7f..0c6be93d261126ed7a7ff37fceb9abd914222298 100644
--- a/Source/bindings/tests/idls/TestCustomAccessors.idl
+++ b/Source/bindings/tests/idls/TestCustomAccessors.idl
@@ -27,13 +27,14 @@
  */
 
 [
-    CustomIndexedGetter,
-    CustomIndexedSetter,
-    CustomNamedGetter,
-    CustomNamedSetter,
     CustomEnumerateProperty,
-    CustomDeleteProperty
 ] interface TestCustomAccessors {
     void anotherFunction(DOMString str);
+    [Custom] getter boolean (unsigned long index);
+    [Custom] setter boolean (unsigned long index, Node value);
+    [Custom] deleter boolean (unsigned long index);
+    [Custom] getter Node (DOMString name);
+    [Custom] setter Node (DOMString name, Node value);
+    [Custom] deleter boolean (DOMString name);
 };