Rearrange the XHR interfaces to match the spec order

Source/core/xmlhttprequest/XMLHttpRequestEventTarget.idl

Index: Source/core/xmlhttprequest/XMLHttpRequestEventTarget.idl
diff --git a/Source/core/xmlhttprequest/XMLHttpRequestEventTarget.idl b/Source/core/xmlhttprequest/XMLHttpRequestEventTarget.idl
index 7b5cd5d3435ae9f5eee929ccdad3f11aa4f3593e..6fcab23d2e3c187941de5a65fd47b0ed5af834db 100644
--- a/Source/core/xmlhttprequest/XMLHttpRequestEventTarget.idl
+++ b/Source/core/xmlhttprequest/XMLHttpRequestEventTarget.idl
@@ -27,11 +27,12 @@
 [

[vivekg, 2015/05/27 00:39:22]

nit: Can you please add spec link here?

[philipj_slow, 2015/05/27 08:47:11]

Done.

     Exposed=(Window,DedicatedWorker,SharedWorker)
 ] interface XMLHttpRequestEventTarget : EventTarget {
+    // event handlers
+    attribute EventHandler onloadstart;
+    attribute EventHandler onprogress;
     attribute EventHandler onabort;
     attribute EventHandler onerror;
     attribute EventHandler onload;
-    attribute EventHandler onloadend;
-    attribute EventHandler onloadstart;
-    attribute EventHandler onprogress;
     attribute EventHandler ontimeout;
+    attribute EventHandler onloadend;
 };