Remove throughput_tests

chrome/test/data/perf/rendering/throughput/canvas2d_balls_common/parse_url.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.
-
-function getArgValue(argname)
-{
-  var url = window.location.href;
-  var parts = url.split("?");
-  if (parts.length == 0)
-  {
-    return "";
-  }
-  var arglist = parts[1];
-  var args = arglist.split("&");
-  for (i=0;i<args.length;i++)
-  {
-    var parts = args[i].split("=");
-    if (parts[0] == argname)
-    {
-      value = parts[1];
-      value = unescape(value);
-      return value;
-    }
-  }
-  return "";
-}