Wait for test script to be loaded before calling __get_timings

tools/page_cycler/common/head.js

Index: tools/page_cycler/common/head.js
diff --git a/tools/page_cycler/common/head.js b/tools/page_cycler/common/head.js
index 19a38dce0121eb93bfb7d17bf5242e29581499b3..0af03ce7fd41e2ba886a172b1e15a7f1028062b8 100644
--- a/tools/page_cycler/common/head.js
+++ b/tools/page_cycler/common/head.js
@@ -1,4 +1,4 @@
-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 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.
 
@@ -74,8 +74,11 @@ function __ontimeout() {
   document.location.href = url;
 }
 function __onload() {
-  if (__results)
+  if (__results) {
+    // Set a variable to indicate that the result report page is loaded.
+    document.cookie = " __navigated_to_report=1; path=/";
     return;
+  }
   var unused = document.body.offsetHeight;  // force layout
 
   var ts = 0, td = 0, te = (new Date()).getTime(), tf = 0;