Roll IDLs forward.

third_party/WebCore/xml/XMLHttpRequest.idl

Index: third_party/WebCore/xml/XMLHttpRequest.idl
diff --git a/third_party/WebCore/xml/XMLHttpRequest.idl b/third_party/WebCore/xml/XMLHttpRequest.idl
index 37c694e75cb273b8af24d045ac3542edc3238332..244da04cb432ca965b9ab25e1c902ac70d4a4892 100644
--- a/third_party/WebCore/xml/XMLHttpRequest.idl
+++ b/third_party/WebCore/xml/XMLHttpRequest.idl
@@ -43,6 +43,7 @@
     attribute EventListener onloadend;
     attribute EventListener onloadstart;
     attribute EventListener onprogress;
+    [Conditional=XHR_TIMEOUT] attribute EventListener ontimeout;
 
     // event handler attributes
     attribute EventListener onreadystatechange;
@@ -54,6 +55,8 @@
     const unsigned short LOADING = 3;
     const unsigned short DONE = 4;
 
+    [Conditional=XHR_TIMEOUT] attribute unsigned long timeout
+        setter raises(DOMException);
     readonly attribute unsigned short readyState;
 
     attribute boolean withCredentials
@@ -117,4 +120,3 @@
     boolean dispatchEvent(in Event evt)
         raises(EventException);
 };
-