Add Web Page Replay test to page cycler.

tools/page_cycler/webpagereplay/start.js

Index: tools/page_cycler/webpagereplay/start.js
diff --git a/tools/page_cycler/webpagereplay/start.js b/tools/page_cycler/webpagereplay/start.js
new file mode 100644
index 0000000000000000000000000000000000000000..6ff5e6dc9c6c216feb23968d1cc72e1fccc649df
--- /dev/null
+++ b/tools/page_cycler/webpagereplay/start.js
@@ -0,0 +1,123 @@
+// 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.
+
+// webpagereplay/start.js - Start Web Page Replay (WPR) test.
+//
+// This script is included by webpagereplay/start.html.
+// The query parameter "test=TEST_NAME" is required to load the
+// test configuration from webpagereplay/tests/TEST_NAME.js
+// That JavaScript file defines a global, "pageSets", as a list of lists:
+//       [ [url_1, url_2], [url_3], ...],
+//       - Before each sublist:
+//         Run chrome.browingData.remove and close the connections.
+//       - Before each url in a sublist:
+//         Close the connections.
+//
+// These WPR tests use a Chrome extension to load the test URLs.
+// The extension loads the test configuration via a DOM elemment
+// (id=json).  This script sets the content of that DOM element.
+//
+// The test runs immediately after being loaded.
+//
+
+
+var options = location.search.substring(1).split('&');
+function getopt(name) {
+  var r = new RegExp('^' + name + '=');
+  for (i = 0; i < options.length; ++i) {
+    if (options[i].match(r)) {
+      return options[i].substring(name.length + 1);
+    }
+  }
+  return null;
+}
+
+function LoadTestConfigurationScript(testUrl, callback) {
+  var testjs = document.createElement('script');
+  testjs.type = 'text/javascript';
+  testjs.async = true;
+  testjs.src = testUrl
+  var s = document.getElementsByTagName('script')[0];
+  testjs.addEventListener('load', callback, false);
+  s.parentNode.insertBefore(testjs, s);
+}
+
+function ReloadIfStuck() {
+  setTimeout(function() {
+      var status = document.getElementById('status');
+      // The status text is set to 'STARTING' by the extension.
+      if (status.textContent != 'STARTING') {
+        console.log('Benchmark stuck?  Reloading.');
+        window.location.reload(true);
+      }
+    }, 30000);
+}
+
+function RenderForm() {
+  var form = document.createElement('FORM');
+  form.setAttribute('action', 'start.html');
+
+  var label = document.createTextNode('Iterations: ');
+  form.appendChild(label);
+
+  var input = document.createElement('INPUT');
+  var iterations = getopt('iterations');
+  input.setAttribute('name', 'iterations');
+  input.setAttribute('value', iterations ? iterations : '5');
+  form.appendChild(input);
+
+  form.appendChild(document.createElement('P'));
+
+  var label = document.createTextNode('Test: ');
+  form.appendChild(label);
+
+  var input = document.createElement('INPUT');
+  input.setAttribute('name', 'test');
+  var test = getopt('test');
+  input.setAttribute('value', test ? test : '');
+  form.appendChild(input);
+
+  var input = document.createElement('INPUT');
+  input.setAttribute('name', 'auto');
+  var auto = getopt('auto');
+  input.setAttribute('value', 1);
+  input.setAttribute('type', 'hidden');
+  form.appendChild(input);
+
+  form.appendChild(document.createElement('P'));
+
+  input = document.createElement('INPUT');
+  input.setAttribute('type', 'submit');
+  input.setAttribute('value', 'Start');
+  form.appendChild(input);
+
+  document.getElementById('startform').appendChild(form);
+}
+
+
+var iterations = getopt('iterations');
+var test_name = getopt('test');
+var is_auto_start = getopt('auto');
+
+RenderForm();
+if (test_name) {
+  var testUrl = 'tests/' + test_name + '.js';
+  LoadTestConfigurationScript(testUrl, function() {
+      var testConfig = {};
+      if (iterations) {
+        testConfig['iterations'] = iterations;
+      }
+      // The pageSets global is set by test configuration script.
+      testConfig['pageSets'] = pageSets;
+
+      if (is_auto_start) {
+        testConfig['shouldStart'] = 1;
+        ReloadIfStuck();
+      }
+      // Write testConfig to "json" DOM element for the Chrome extension.
+      document.getElementById('json').textContent = JSON.stringify(testConfig);
+    });
+} else {
+  console.log('Need "test=TEST_NAME" query parameter.');
+}