IndexedDB: Stop using webkit-prefixed versions of APIs in tests

tools/perf/page_sets/endure/indexeddb_app.js

 // Copyright 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.
 
 // This file simulates a typical foreground process of an offline-capable
 // authoring application. When in an "offline" state, simulated user actions
 // are recorded for later playback in an IDB data store. When in an "online"
 // state, the recorded actions are drained from the store (as if being sent
 // to the server).
 
-self.indexedDB = self.indexedDB || self.webkitIndexedDB ||
-  self.mozIndexedDB;
-self.IDBKeyRange = self.IDBKeyRange || self.webkitIDBKeyRange;
-
 var $ = function(s) {
   return document.querySelector(s);
 };
 
 function status(message) {
   var elem = $('#status');
   while (elem.firstChild)
     elem.removeChild(elem.firstChild);
   elem.appendChild(document.createTextNode(message));
 }
 
 function log(message) {
   status(message);
 }
 
 function error(message) {
   status(message);
   console.error(message);
 }
 
 function unexpectedErrorCallback(e) {
   error("Unexpected error callback: (" + e.target.error.name + ") " +
-        e.target.webkitErrorMessage);
+        e.target.error.message);
 }
 
 function unexpectedAbortCallback(e) {
   error("Unexpected abort callback: (" + e.target.error.name + ") " +
-        e.target.webkitErrorMessage);
+        e.target.error.message);
 }
 
 function unexpectedBlockedCallback(e) {
   error("Unexpected blocked callback!");
 }
 
 var DBNAME = 'endurance-db';
 var DBVERSION = 1;
 var MAX_DOC_ID = 25;
 
@@ skipping 31 matching lines @@
     };
   };
 }
 
 var offline = true;
 var worker = new Worker('indexeddb_app_worker.js?cachebust');
 worker.onmessage = function (event) {
   var data = event.data;
   switch (data.type) {
     case 'ABORT':
-      unexpectedAbortCallback(
-        {target:{
-           error: data.error,
-           webkitErrorMessage: data.webkitErrorMessage}});
+      unexpectedAbortCallback({target: {error: data.error}});
       break;
     case 'ERROR':
-      unexpectedErrorCallback(
-        {target:{
-           error: data.error,
-           webkitErrorMessage: data.webkitErrorMessage}});
+      unexpectedErrorCallback({target: {error: data.error}});
       break;
     case 'BLOCKED':
-      unexpectedBlockedCallback(
-        {target:{
-           error: data.error,
-           webkitErrorMessage: data.webkitErrorMessage}});
+      unexpectedBlockedCallback({target: {error: data.error}});
       break;
     case 'LOG':
       log('WORKER: ' + data.message);
       break;
     case 'ERROR':
       error('WORKER: ' + data.message);
       break;
     }
 };
 worker.onerror = function (event) {
@@ skipping 157 matching lines @@
 function randomString(len) {
   var s = '';
   while (len--)
     s += Math.floor((Math.random() * 36)).toString(36);
   return s;
 }
 
 window.onload = function () {
   log("initializing...");
   initdb();
-};
+};