Remove old dead perf dashboard pages and js

perf/dashboard/ui/endure_js/common.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 Common methods for performance-plotting Javascript.
- */
-
-/**
- * Fetches a URL asynchronously and invokes a callback when complete.
- *
- * @param {string} url URL to fetch.
- * @param {Function(string, ?string)} callback The function to invoke when the
- *     results of the URL fetch are complete.  The function should accept two
- *     strings representing the URL data, and any errors, respectively.
- */
-function Fetch(url, callback) {
-  var r = new XMLHttpRequest();
-  r.open('GET', url, true);
-  r.setRequestHeader('pragma', 'no-cache');
-  r.setRequestHeader('cache-control', 'no-cache');
-
-  r.onreadystatechange = function() {
-    if (r.readyState == 4) {
-      var text = r.responseText;
-      var error = null;
-      if (r.status != 200)
-        error = url + ': ' + r.status + ': ' + r.statusText;
-      else if (!text)
-        error = url + ': null response';
-      callback(text, error);
-    }
-  }
-
-  r.send(null);
-}
-
-/**
- * Parses the parameters of the current page's URL.
- *
- * @return {Object.<string, (string|number)>} An object with properties given
- *     by the parameters specified in the URL's query string.
- */
-function ParseParams() {
-  var result = {};
-
-  var query = window.location.search.substring(1);
-  if (query.slice(-1) == '/') {
-    query = query.slice(0, -1);  // Strip trailing slash.
-  }
-  var s = query.split('&');
-
-  for (i = 0; i < s.length; ++i) {
-    var v = s[i].split('=');
-    var key = v[0];
-    var value = unescape(v[1]);
-    result[key] = value;
-  }
-
-  if ('history' in result) {
-    result['history'] = parseInt(result['history']);
-    result['history'] = Math.max(result['history'], 2);
-  }
-  if ('rev' in result) {
-    result['rev'] = parseInt(result['rev']);
-  }
-
-  return result;
-}
-
-/**
- * Creates the URL constructed from the current pathname and the given params.
- *
- * @param {Object.<string, (string|number)>} params An object containing
- *     parameters for a URL query string.
- * @return {string} The URL constructed from the given params.
- */
-function MakeURL(params) {
-  var key_values = [];
-  for (key in params) {
-    // better to sanitize key here.
-    key_values.push(key + '=' + encodeURIComponent(params[key]));
-  }
-  return window.location.pathname + '?' + key_values.join('&');
-}