Created file-based test pages for window.location tests.

ios/testing/data/http_server_files/window_location.js

Index: ios/testing/data/http_server_files/window_location.js
diff --git a/ios/testing/data/http_server_files/window_location.js b/ios/testing/data/http_server_files/window_location.js
new file mode 100644
index 0000000000000000000000000000000000000000..a7c4322ee102d492c484437070f2e31fde15ed31
--- /dev/null
+++ b/ios/testing/data/http_server_files/window_location.js
@@ -0,0 +1,43 @@
+// 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() {
+  updateOnLoadText('OnLoadText');
+};
+
+var updateOnLoadText = function(text) {
+  document.getElementById('on-load-div').innerHTML = text;
+}
+
+var updateURLToLoadText = function(text) {

[Eugene But (OOO till 7-30), 2016/12/16 03:38:11]

nit: s/URL/Url per JS Style Guide

[kkhorimoto, 2016/12/20 23:23:45]

Done.

+  document.getElementById('url-to-load').innerHTML = text;
+}
+
+// Returns a DOMString representing the URL used as the innerHTML of the
+// url-to-load div.
+var getURL = function() {

[Eugene But (OOO till 7-30), 2016/12/16 03:38:11]

ditto

[kkhorimoto, 2016/12/20 23:23:45]

Done.

+  return document.getElementById('url-to-load').innerHTML;
+}
+
+var locationAssign = function() {
+  updateOnLoadText('');
+  window.location.assign(getURL());
+}
+
+var locationReplace = function() {
+  updateOnLoadText('');
+  window.location.replace(getURL());
+}
+
+var locationReload = function() {
+  updateOnLoadText('');
+  window.location.reload();
+}
+
+var setLocationToDOMString = function() {
+  updateOnLoadText('');
+  window.location = getURL();
+}
+