[Telemetry] Clean up some page cycler cruft now that idb has moved out.

tools/perf/measurements/page_cycler.js

 // Copyright (c) 2013 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.
 
 (function() {
 // The Mozilla DHTML performance tests need to explicitly call a function to
 // trigger the next page visit, rather than directly using the onload handler.
 // To meet needs of the DHTML performance tests without forking this head.js
 // file, use a variable |__install_onload_handler| to indicate whether the
 // |__onload| handler should be added to onload event listener.
@@ skipping 15 matching lines @@
 function __onbeforeunload() {
   // Call GC twice to cleanup JS heap before starting a new test.
   if (window.gc) {
     window.gc();
     window.gc();
   }
 }
 
 // The function |__onload| is used by the DHTML tests.
 window.__onload = function() {
-  // window.storeCreated is used by the Indexed DB tests.
-  if ((!__install_onload_handler || window.storeCreated) &&
-      !performance.timing.loadEventEnd)
+  if (!__install_onload_handler && !performance.timing.loadEventEnd)
     return;
 
   var unused = document.body.offsetHeight;  // force layout
 
-  testComplete(window.performance.now());
-};
-
-// The function |testComplete| is used by the Indexed DB tests.
-window.testComplete = function(time) {
-  window.__pc_load_time = time;
+  window.__pc_load_time = window.performance.now();
 };
 
 // The function |__eval_later| now is only used by the DHTML tests.
 window.__eval_later = function(expression) {
   setTimeout(expression, __test_timeout);
 };
 
 if (window.parent == window) {  // Ignore subframes.
   window.__pc_load_time = null;
   addEventListener("load", __onload);
   addEventListener("beforeunload", __onbeforeunload);
 }
-})();
+})();