diff --git a/dom/public/idl/xul/XULElement.idl b/dom/public/idl/xul/XULElement.idl
index 7f5b11a08b61..e3571a245b24 100644
--- a/dom/public/idl/xul/XULElement.idl
+++ b/dom/public/idl/xul/XULElement.idl
@@ -9,7 +9,7 @@ interface XULElement : Element {
         readonly attribute xpidl nsIXULTemplateBuilder     builder;
         readonly attribute xpidl nsIRDFResource            resource;
         readonly attribute xpidl nsIControllers            controllers;
-        readonly attribute NodeList                        anonymousContent;
+        readonly attribute xpidl nsIBoxObject              boxObject;
 
         void addBroadcastListener(in DOMString attr, in Element element);
         void removeBroadcastListener(in DOMString attr, in Element element);
diff --git a/rdf/content/public/idl/XULCheckboxElement.idl b/rdf/content/public/idl/XULCheckboxElement.idl
deleted file mode 100644
index b29b90e41bd1..000000000000
--- a/rdf/content/public/idl/XULCheckboxElement.idl
+++ /dev/null
@@ -1,12 +0,0 @@
-interface XULCheckboxElement : XULElement {
-/* IID: { 0xa5f00fa2, 0xe874, 0x11d3, \
-  { 0xbf, 0x87, 0x0, 0x10, 0x5a, 0x1b, 0x6, 0x27 } } */
-
-  attribute DOMString value;
-  attribute DOMString crop;
-  attribute boolean disabled;
-  attribute DOMString src;
-  attribute DOMString imgalign;
-  attribute DOMString accesskey;
-  attribute boolean checked;
-};
diff --git a/rdf/content/public/idl/XULElement.idl b/rdf/content/public/idl/XULElement.idl
index 7f5b11a08b61..e3571a245b24 100644
--- a/rdf/content/public/idl/XULElement.idl
+++ b/rdf/content/public/idl/XULElement.idl
@@ -9,7 +9,7 @@ interface XULElement : Element {
         readonly attribute xpidl nsIXULTemplateBuilder     builder;
         readonly attribute xpidl nsIRDFResource            resource;
         readonly attribute xpidl nsIControllers            controllers;
-        readonly attribute NodeList                        anonymousContent;
+        readonly attribute xpidl nsIBoxObject              boxObject;
 
         void addBroadcastListener(in DOMString attr, in Element element);
         void removeBroadcastListener(in DOMString attr, in Element element);
diff --git a/rdf/content/public/idl/XULRadioElement.idl b/rdf/content/public/idl/XULRadioElement.idl
deleted file mode 100644
index e9c90272a517..000000000000
--- a/rdf/content/public/idl/XULRadioElement.idl
+++ /dev/null
@@ -1,13 +0,0 @@
-interface XULRadioElement : XULElement {
-/* IID: { 0xa5f00fa1, 0xe874, 0x11d3, \
-  { 0xbf, 0x87, 0x0, 0x10, 0x5a, 0x1b, 0x6, 0x27 } } */
-
-  attribute DOMString value;
-  attribute DOMString crop;
-  attribute boolean disabled;
-  attribute DOMString src;
-  attribute DOMString imgalign;
-  attribute DOMString accesskey;
-  attribute boolean checked;
-};
-
diff --git a/rdf/content/public/idl/XULRadioGroupElement.idl b/rdf/content/public/idl/XULRadioGroupElement.idl
deleted file mode 100644
index 093db62340d8..000000000000
--- a/rdf/content/public/idl/XULRadioGroupElement.idl
+++ /dev/null
@@ -1,7 +0,0 @@
-interface XULRadioGroupElement : XULElement {
-/* IID: { 0xc2dd83e1, 0xef22, 0x11d3, \
-{ 0xbf, 0x87, 0x0, 0x10, 0x5a, 0x1b, 0x6, 0x27 } } */
-
-  attribute XULRadioElement selectedItem;
-};
-
diff --git a/rdf/content/public/idl/XULTitledButtonElement.idl b/rdf/content/public/idl/XULTitledButtonElement.idl
deleted file mode 100644
index 590ded48b518..000000000000
--- a/rdf/content/public/idl/XULTitledButtonElement.idl
+++ /dev/null
@@ -1,10 +0,0 @@
-interface XULTitledButtonElement : XULElement {
-/* IID: { 0xa5f00fa3, 0xe874, 0x11d3, \
-  { 0xbf, 0x87, 0x0, 0x10, 0x5a, 0x1b, 0x6, 0x27 } } */
-  attribute DOMString value;
-  attribute DOMString crop;
-  attribute boolean disabled;
-  attribute DOMString src;
-  attribute DOMString imgalign;
-  attribute DOMString accesskey;
-};
diff --git a/rdf/content/public/idl/makefile.win b/rdf/content/public/idl/makefile.win
index d76e7fa57b3e..8eeae8b41ff4 100644
--- a/rdf/content/public/idl/makefile.win
+++ b/rdf/content/public/idl/makefile.win
@@ -33,10 +33,6 @@ IDLSRCS =  \
         XULTreeElement.idl      \
         XULEditorElement.idl      \
 		XULPopupElement.idl \
-		XULTitledButtonElement.idl \
-		XULCheckboxElement.idl \
-		XULRadioElement.idl \
-		XULRadioGroupElement.idl \
 		XULMenuListElement.idl \
        $(NULL)