Telemetry media_measurement plus play action and tests.

tools/perf/page_sets/video_stack/utils.js

-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// 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.

[nduca, 2013/06/17 23:01:33]

this file seems unused? or rather a lot of the stuff in it seems unused... help
me understand?

[shadi, 2013/06/21 00:39:51]

It is used by the page sets html files. It serves as a URL query  function.

 //
 // Miscellaneous utility functions for HTML media tests. Loading this script
 // should not modify the page in any way.
-//
 
-var QueryString = function () {
+var QueryString = function() {
   // Allows access to query parameters on the URL; e.g., given a URL like:
-  //
   //    http://<url>/my.html?test=123&bob=123
-  //
   // parameters can now be accessed via QueryString.test or QueryString.bob.
   var params = {};
-
   // RegEx to split out values by &.
   var r = /([^&=]+)=?([^&]*)/g;
-
   // Lambda function for decoding extracted match values. Replaces '+' with
   // space so decodeURIComponent functions properly.
   function d(s) { return decodeURIComponent(s.replace(/\+/g, ' ')); }
-
   var match;
   while (match = r.exec(window.location.search.substring(1)))
     params[d(match[1])] = d(match[2]);
-
   return params;
-} ();
-
-function getCurrentTime() {
-  if (window.performance.now)
-    return window.performance.now();
-  else
-    return new Date().getTime();
-}
-
-function Timer() {
-  this.start_ = 0;
-  this.times_ = [];
-}
-
-Timer.prototype = {
-  start: function() {
-    this.start_ = getCurrentTime();
-  },
-
-  stop: function() {
-    var delta = getCurrentTime() - this.start_;
-    this.times_.push(delta);
-    return delta;
-  },
-
-  reset: function() {
-    this.start_ = 0;
-    this.times_ = [];
-  }
-}
-
-function GenerateUniqueURL(src) {
-  var ch = src.indexOf('?') >= 0 ? '&' : '?';
-  return src + ch + 't=' + (new Date()).getTime();
-}
+}();