Adding client code for new desktop First Run Experience.

chrome/browser/ui/webui/welcome_ui.h

Index: chrome/browser/ui/webui/welcome_ui.h
diff --git a/chrome/browser/ui/webui/welcome_ui.h b/chrome/browser/ui/webui/welcome_ui.h
new file mode 100644
index 0000000000000000000000000000000000000000..dec1c1720dbef43f9e006ded1ebdd5257d584cf2
--- /dev/null
+++ b/chrome/browser/ui/webui/welcome_ui.h
@@ -0,0 +1,20 @@
+// Copyright (c) 2016 The Chromium Authors. All rights reserved.

[michaelpg, 2016/09/06 22:21:57]

throughout: no (c):
https://chromium.googlesource.com/chromium/src/+/master/styleguide/c++/c++.md...

[tmartino, 2016/09/07 23:06:43]

Done

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_UI_WEBUI_WELCOME_UI_H_
+#define CHROME_BROWSER_UI_WEBUI_WELCOME_UI_H_
+
+#include "content/public/browser/web_ui_controller.h"
+#include "url/gurl.h"
+
+// The WebUI for chrome://welcome, the page which greets new Desktop users and
+// promotes sign-in.
+
+class WelcomeUI : public content::WebUIController {
+ public:
+  explicit WelcomeUI(content::WebUI* web_ui, const GURL& url);

[michaelpg, 2016/09/06 22:21:57]

omit explicit for multi-arg constructors:
https://engdoc.corp.google.com/eng/doc/devguide/cpp/styleguide.shtml?cl=head#...

[tmartino, 2016/09/07 23:06:43]

Done

+  ~WelcomeUI() override;
+};
+
+#endif  // CHROME_BROWSER_UI_WEBUI_WELCOME_UI_H_