Created test page to be used for window.history.go() tests.

ios/testing/data/http_server_files/history_go.js

+// Copyright 2016 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.
+
+// Adds event listeners and populates on-load-div.
+window.onload = function() {
+  window.addEventListener('popstate', onPopstate);
+  window.addEventListener('hashchange', onHashChange);
+  updateOnLoadText('OnLoadText');
+};
+
+// Populates pop-state-received-div and state-object-div upon a popstate event.
+var onPopstate = function(e) {
+  updatePopStateReceivedText(true);
+  updateStateObjectText(e.state);
+};
+
+// Populates hash-change-received-div upon receiving of a hashchange event.
+var onHashChange = function(e) {
+  updateHashChangeReceivedText(true);
+}
+
+var updateOnLoadText = function(text) {
+  document.getElementById('on-load-div').innerHTML = text;
+}
+
+var updateNoOpText = function(text) {
+  document.getElementById('no-op-div').innerHTML = text;
+}
+
+var updatePopStateReceivedText = function(received) {
+  var text = received ? 'PopStateReceived' : '';
+  document.getElementById('pop-state-received-div').innerHTML = text;
+}
+
+var updateStateObjectText = function(state) {
+  document.getElementById('state-object-div').innerHTML = state;
+}
+
+var updateHashChangeReceivedText = function(received) {
+  var text = received ? 'HashChangeReceived' : '';
+  document.getElementById('hash-change-received-div').innerHTML = text;
+}
+
+// Clears all div text an starts a timer that updates no-op-div with "NoOpText"
+// after 1s.  This allows tests to verify that no nagivations occur after a
+// no-op JavaScript call.
+var onButtonTapped = function() {
+  updateOnLoadText('');
+  updateNoOpText('');
+  updatePopStateReceivedText(false);
+  updateStateObjectText('');
+  updateHashChangeReceivedText(false);
+  setTimeout("updateNoOpText('NoOpText')", 1000);
+}
+
+var goNoParameter = function() {
+  onButtonTapped();
+  window.history.go();
+}
+
+var goZero = function() {
+  onButtonTapped();
+  window.history.go(0);
+}
+
+var go2 = function() {
+  onButtonTapped();
+  window.history.go(2);
+}
+
+var goBack2 = function() {
+  onButtonTapped();
+  window.history.go(-2);
+}