Remove base.* methods.

Tools/GardeningServer/ui/ct-results-detail-tests.html

 <!--
 Copyright 2014 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.
 -->
 
 <link rel="import" href="ct-results-detail.html">
 
 <script>
 (function () {
 
 module("ct-results-detail");
 
 asyncTest("image+text", 4, function() {
   var simulator = new NetworkSimulator();
   var probedUrls = [];
 
   simulator.probe = function(url)
   {
     probedUrls.push(url);
-    if (base.endsWith(url, '.txt') || base.endsWith(url, '.png'))
+    if (url.endsWith('.txt') || url.endsWith('.png'))
         return Promise.resolve();
     else
         return Promise.reject();
   };
 
   simulator.runTest(function() {
     var comparisonResult = document.createElement('ct-results-detail');
     comparisonResult.test = 'dummy/test.html';
     comparisonResult.builder = 'dummy builder';
     comparisonResult.result = 'IMAGE+TEXT';
@@ skipping 17 matching lines @@
   });
 });
 
 asyncTest("crash", 4, function() {
   var simulator = new NetworkSimulator();
   var probedUrls = [];
 
   simulator.probe = function(url)
   {
     probedUrls.push(url);
-    if (base.endsWith(url, '.txt'))
+    if (url.endsWith('.txt'))
         return Promise.resolve();
     else
         return Promise.reject();
   };
 
   simulator.runTest(function() {
     var crashResult = document.createElement('ct-results-detail');
     crashResult.test = 'dummy/test.html';
     crashResult.builder = 'dummy builder';
     crashResult.result = 'CRASH';
 
     crashResult.async(function() {
       deepEqual(probedUrls, [
           'https://storage.googleapis.com/chromium-layout-test-archives/dummy_builder/results/layout-test-results/dummy/test-crash-log.txt',
       ]);
 
       var crashOutputs = crashResult.shadowRoot.querySelectorAll('ct-test-output');
       equal(crashOutputs.length, 1);
       equal(crashResult.shadowRoot.querySelectorAll('ct-results-comparison').length, 0);
 
       start();
     });
   });
 });
 
 })()
 </script>