DevTools: [HeapProfiler] Provide API for heap objects tracking info.

LayoutTests/http/tests/inspector-protocol/resources/InspectorTest.js

 /*
  * Copyright (C) 2012 Samsung Electronics. 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 80 matching lines @@
 
 
 /**
  * @param {string} scriptName
  */
 InspectorTest.importScript = function(scriptName)
 {
     var xhr = new XMLHttpRequest();
     xhr.open("GET", scriptName, false);
     xhr.send(null);
-    window.eval(xhr.responseText);
+    window.eval(xhr.responseText + "\n//@ sourceURL=" + scriptName);
 }
 
 window.addEventListener("message", function(event) {
     try {
         eval(event.data);
     } catch (e) {
         alert(e.stack);
         InspectorTest.completeTest();
         throw e;
     }
 });