Add chrome://site-engagement WebUI.

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

Index: chrome/browser/ui/webui/engagement/site_engagement_ui_handler.h
diff --git a/chrome/browser/ui/webui/engagement/site_engagement_ui_handler.h b/chrome/browser/ui/webui/engagement/site_engagement_ui_handler.h
new file mode 100644
index 0000000000000000000000000000000000000000..8787b3bc2cf4a856f93712e79a432fd142be32d3
--- /dev/null
+++ b/chrome/browser/ui/webui/engagement/site_engagement_ui_handler.h
@@ -0,0 +1,41 @@
+// Copyright (c) 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_HANDLER_H_
+#define CHROME_BROWSER_UI_WEBUI_ENGAGEMENT_SITE_ENGAGEMENT_UI_HANDLER_H_
+
+#include "base/basictypes.h"
+#include "chrome/browser/ui/webui/engagement/site_engagement.mojom.h"
+#include "chrome/browser/ui/webui/mojo_web_ui_handler.h"
+#include "third_party/mojo/src/mojo/public/cpp/bindings/strong_binding.h"
+
+class Profile;
+
+// Implementation of SiteEngagementUIHandlerMojo. StartOmniboxQuery() calls to a

[Sam McNally, 2015/09/08 08:25:47]

Update.

[calamity, 2015/09/10 06:57:33]

Oops.

+// private AutocompleteController. It also listens for updates from the
+// AutocompleteController to OnResultChanged() and passes those results to
+// the OmniboxPage.
+class SiteEngagementUIHandler : public SiteEngagementUIHandlerMojo,

[Sam McNally, 2015/09/08 08:25:47]

If you don't need this to be public, consider putting it in
site_engagement_ui.cc.

[calamity, 2015/09/10 06:57:33]

Hmm. I can't think of any reason it would need to be. If it turns out we need it
to be down the line, we can always change it.

+                                public MojoWebUIHandler {

[Sam McNally, 2015/09/08 08:25:47]

I don't think this is necessary anymore.

[calamity, 2015/09/10 06:57:33]

Done.

+ public:
+  // SiteEngagementUIHandler is deleted when the supplied pipe is destroyed.
+  SiteEngagementUIHandler(
+      Profile* profile,
+      mojo::InterfaceRequest<SiteEngagementUIHandlerMojo> request);
+  ~SiteEngagementUIHandler() override;
+
+  // SiteEngagementUIHandlerMojo overrides:
+  void GetSiteEngagementInfo(
+      const GetSiteEngagementInfoCallback& callback) override;
+
+ private:
+  // The Profile* handed to us in our constructor.
+  Profile* profile_;
+
+  mojo::StrongBinding<SiteEngagementUIHandlerMojo> binding_;
+
+  DISALLOW_COPY_AND_ASSIGN(SiteEngagementUIHandler);
+};
+
+#endif  // CHROME_BROWSER_UI_WEBUI_ENGAGEMENT_SITE_ENGAGEMENT_UI_HANDLER_H_