Add unittest to test CWVWebView.

ios/web_view/test/test_server.h

+// Copyright 2017 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.
+
+#ifndef IOS_WEB_VIEW_TEST_TEST_SERVER_H_
+#define IOS_WEB_VIEW_TEST_TEST_SERVER_H_
+
+#include <string>
+
+namespace ios_web_view {
+
+class TestServer {

[Eugene But (OOO till 7-30), 2017/05/19 18:39:49]

I think we should be consistent with other tests in the way how Local Server is
setup. So if there are any helpers you'd like to create then we need to make
them generic and reusable in other tests. But that should be a separate CL and a
separate discussion.

[michaeldo, 2017/05/23 16:20:52]

Acknowledged.

+ public:
+  static bool Start();

[Eugene But (OOO till 7-30), 2017/05/19 18:39:49]

Generally there is no need to create a class which only has static methods.
Functions placed in C++ namespacing work pretty well.

[michaeldo, 2017/05/23 16:20:52]

Good point, I removed this class and followed example in
net/test/EmbeddedTestServer.h by creating a test server in Setup inside the test
class which also fixes the global test ptr that was in this first patch.

+  static void Shutdown();
+
+  // Returns URL to an html page with title set to |title|.
+  static std::string GetPageTitleURL(const std::string& title);
+
+  // Returns URL to an html page with |html| within page's body tags.
+  static std::string GetPageWithHTMLBody(const std::string& html);
+};
+
+}  // namespace ios_web_view
+
+#endif  // IOS_WEB_VIEW_TEST_TEST_SERVER_H_