Change MojoWebUIController to use mojo::StrongBindingSet.

chrome/browser/ui/webui/engagement/site_engagement_ui.h

 // Copyright 2015 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_ENGAGEMENT_SITE_ENGAGEMENT_UI_H_
 #define CHROME_BROWSER_UI_WEBUI_ENGAGEMENT_SITE_ENGAGEMENT_UI_H_
 
 #include "base/macros.h"
 #include "chrome/browser/ui/webui/engagement/site_engagement.mojom.h"
+#include "chrome/browser/ui/webui/engagement/site_engagement_ui_handler.h"
 #include "chrome/browser/ui/webui/mojo_web_ui_controller.h"
 
+namespace content {
+class WebUI;
+}
+
 // The UI for chrome://site-engagement/.
-class SiteEngagementUI : public MojoWebUIController<SiteEngagementUIHandler> {
+class SiteEngagementUI
+    : public MojoWebUIController<SiteEngagementUIHandlerImpl> {
  public:
   explicit SiteEngagementUI(content::WebUI* web_ui);
   ~SiteEngagementUI() override;
 
  private:
-  // MojoWebUIController overrides:
-  void BindUIHandler(
-      mojo::InterfaceRequest<SiteEngagementUIHandler> request) override;
-
   DISALLOW_COPY_AND_ASSIGN(SiteEngagementUI);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_ENGAGEMENT_SITE_ENGAGEMENT_UI_H_