Added experiments section and exported the list of SafeBrowsing features in WebUI

components/safe_browsing/web_ui/safe_browsing_ui.h

-// Copyright (c) 2017 The Chromium Authors. All rights reserved.
+// 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 CHROME_BROWSER_UI_WEBUI_SAFE_BROWSING_UI_H_
-#define CHROME_BROWSER_UI_WEBUI_SAFE_BROWSING_UI_H_
+#ifndef COMPONENTS_SAFE_BROWSING_WEBUI_SAFE_BROWSING_UI_H_
+#define COMPONENTS_SAFE_BROWSING_WEBUI_SAFE_BROWSING_UI_H_
 
+#include "base/bind.h"
+#include "base/callback.h"
 #include "base/macros.h"
+#include "base/values.h"
 #include "content/public/browser/url_data_source.h"
+#include "content/public/browser/web_contents.h"
+#include "content/public/browser/web_ui.h"
 #include "content/public/browser/web_ui_controller.h"
+#include "content/public/browser/web_ui_data_source.h"
+#include "content/public/browser/web_ui_message_handler.h"
+
+namespace safe_browsing {
+class SafeBrowsingUIHandler : public content::WebUIMessageHandler {
+ public:
+  SafeBrowsingUIHandler();
+  ~SafeBrowsingUIHandler() override;
+  void ExpParamList(const base::ListValue* args);
+  void RegisterMessages() override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(SafeBrowsingUIHandler);
+};
 
 // The WebUI for chrome://safe-browsing
 class SafeBrowsingUI : public content::WebUIController {
  public:
   explicit SafeBrowsingUI(content::WebUI* web_ui);
   ~SafeBrowsingUI() override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(SafeBrowsingUI);
 };
+}  // namespace safe_browsing
 
-#endif  // CHROME_BROWSER_UI_WEBUI_SAFE_BROWSING_UI_H_
+#endif  // COMPONENTS_SAFE_BROWSING_WEBUI_SAFE_BROWSING_UI_H_