Revert r101718 "wait for test script to be loaded"

tools/page_cycler/common/head.js

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 var __c = ""; // that's good enough for me.
 var __td;
 var __tf;
 var __tl;
 var __iterations;
 var __cycle;
@@ skipping 56 matching lines @@
     if (window.console) console.log("times: [" + __get_timings() + "]");
   } else {
     doc = "../" + __pages()[__page] + "/index.html";
   }
 
   var url = doc + "?n=" + __iterations + "&i=" + __cycle + "&p=" + __page +
             "&ts=" + ts + "&td=" + __td + "&tf=" + __tf;
   document.location.href = url;
 }
 function __onload() {
-  if (__results) {
-    // Set a variable to indicate that the result report page is loaded.
-    document.cookie = " __navigated_to_report=1; path=/";
+  if (__results)
     return;
-  }
   var unused = document.body.offsetHeight;  // force layout
 
   var ts = 0, td = 0, te = (new Date()).getTime(), tf = 0;
 
   var s = document.location.search;
   if (s) {
     var params = s.substring(1).split('&');
     for (var i = 0; i < params.length; ++i) {
       var f = params[i].split('=');
       switch (f[0]) {
@@ skipping 26 matching lines @@
   __te = te;
   __tf = tf;  // record t-fudge
 
   setTimeout("__ontimeout()", __TIMEOUT);
 }
 
 if (window.attachEvent)
   window.attachEvent("onload", __onload);
 else
   addEventListener("load", __onload, false);