Support for selective DOM activity logging, based on IDL attributes.

Source/core/xml/XMLHttpRequest.idl

 /*
  * Copyright (C) 2008, 2011 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 50 matching lines @@
     const unsigned short OPENED = 1;
     const unsigned short HEADERS_RECEIVED = 2;
     const unsigned short LOADING = 3;
     const unsigned short DONE = 4;
 
     [Conditional=XHR_TIMEOUT, SetterRaisesException] attribute unsigned long timeout;
     readonly attribute unsigned short readyState;
 
     [SetterRaisesException] attribute boolean withCredentials;
 
-    [Custom, RaisesException] void open(DOMString method, DOMString url, optional boolean async, optional DOMString user, optional DOMString password);
+    [Custom, ActivityLog=Access, RaisesException] void open(DOMString method, DOMString url, optional boolean async, optional DOMString user, optional DOMString password);
 
-    [RaisesException] void setRequestHeader(DOMString header, DOMString value);
+    [ActivityLog=Access, RaisesException] void setRequestHeader(DOMString header, DOMString value);
 
     [Custom, RaisesException] void send();
 
     void abort();
 
     readonly attribute XMLHttpRequestUpload upload;
 
     // response
     [TreatReturnedNullStringAs=Undefined, RaisesException] DOMString getAllResponseHeaders();
     [TreatReturnedNullStringAs=Null, RaisesException] DOMString getResponseHeader(DOMString header);
@@ skipping 11 matching lines @@
 
     // EventTarget interface
     void addEventListener(DOMString type, 
                           EventListener listener, 
                           optional boolean useCapture);
     void removeEventListener(DOMString type, 
                              EventListener listener, 
                              optional boolean useCapture);
     [RaisesException] boolean dispatchEvent(Event evt);
 };