Delete the WebUI implementation of the task manager.

chrome/browser/resources/task_manager/measure_time.js

-// Copyright (c) 2012 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.
-
-/**
- * @fileoverview Utility methods for measuring loading times.
- *
- * To be included as a first script in main.html
- */
-
-/**
- * measureTime class
- * @constructor
- */
-var measureTime = {
-  isEnabled: localStorage.measureTimeEnabled,
-
-  startInterval: function(name) {
-    if (this.isEnabled)
-      console.time(name);
-  },
-
-  recordInterval: function(name) {
-    if (this.isEnabled)
-      console.timeEnd(name);
-  },
-};
-
-measureTime.startInterval('Load.Total');
-measureTime.startInterval('Load.Script');