Add chrome://site-engagement WebUI.

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

+// 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.
+
+#include "chrome/browser/ui/webui/engagement/site_engagement_ui.h"
+
+#include "chrome/browser/engagement/site_engagement_service.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/common/url_constants.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 "grit/browser_resources.h"
+#include "mojo/common/url_type_converters.h"
+#include "third_party/mojo/src/mojo/public/cpp/bindings/strong_binding.h"
+
+namespace {
+
+// Implementation of SiteEngagementUIHandler that gets information from the
+// SiteEngagementService to provide data for the WebUI.
+class SiteEngagementUIHandlerImpl : public SiteEngagementUIHandler {
+ public:
+  // SiteEngagementUIHandlerImpl is deleted when the supplied pipe is destroyed.
+  SiteEngagementUIHandlerImpl(
+      Profile* profile,
+      mojo::InterfaceRequest<SiteEngagementUIHandler> request)
+      : profile_(profile), binding_(this, request.Pass()) {}

[Dan Beam, 2015/09/10 17:33:54]

maybe { DCHECK(profile_); }

[calamity, 2015/09/11 07:48:24]

Done.

+
+  ~SiteEngagementUIHandlerImpl() override {}
+
+  // SiteEngagementUIHandler overrides:
+  void GetSiteEngagementInfo(
+      const GetSiteEngagementInfoCallback& callback) override {
+    mojo::Array<SiteEngagementInfoPtr> engagement_info(0);
+
+    SiteEngagementService* service = SiteEngagementService::Get(profile_);
+    DCHECK(service);

[Dan Beam, 2015/09/10 17:33:55]

nit: DCHECK(thing); thing->DoSomething() has never been that helpful, IMO

[calamity, 2015/09/11 07:48:24]

Done.

+
+    for (auto info : service->GetScoreMap()) {

[Dan Beam, 2015/09/10 17:33:55]

nit: auto -> actual type for readability, IMO

[calamity, 2015/09/11 07:48:24]

Done.

+      SiteEngagementInfoPtr origin_info(SiteEngagementInfo::New());
+      origin_info->origin = mojo::String::From(info.first);
+      origin_info->score = info.second;
+      engagement_info.push_back(origin_info.Pass());
+    }
+
+    callback.Run(engagement_info.Pass());
+  }
+
+ private:
+  // The Profile* handed to us in our constructor.
+  Profile* profile_;
+
+  mojo::StrongBinding<SiteEngagementUIHandler> binding_;
+
+  DISALLOW_COPY_AND_ASSIGN(SiteEngagementUIHandlerImpl);
+};
+
+}  // namespace
+
+SiteEngagementUI::SiteEngagementUI(content::WebUI* web_ui)
+    : MojoWebUIController<SiteEngagementUIHandler>(web_ui) {
+  // Set up the chrome://site-engagement/ source.
+  scoped_ptr<content::WebUIDataSource> source(
+      content::WebUIDataSource::Create(chrome::kChromeUISiteEngagementHost));
+  source->AddResourcePath("engagement_table.html",
+                          IDR_SITE_ENGAGEMENT_ENGAGEMENT_TABLE_HTML);
+  source->AddResourcePath("engagement_table.css",
+                          IDR_SITE_ENGAGEMENT_ENGAGEMENT_TABLE_CSS);
+  source->AddResourcePath("engagement_table.js",
+                          IDR_SITE_ENGAGEMENT_ENGAGEMENT_TABLE_JS);
+  source->AddResourcePath("site_engagement.js", IDR_SITE_ENGAGEMENT_JS);
+  source->SetDefaultResource(IDR_SITE_ENGAGEMENT_HTML);
+
+  content::WebUIDataSource::Add(Profile::FromWebUI(web_ui), source.release());
+
+  AddMojoResourcePath(
+      "chrome/browser/ui/webui/engagement/site_engagement.mojom",
+      IDR_SITE_ENGAGEMENT_MOJO_JS);
+}
+
+SiteEngagementUI::~SiteEngagementUI() {}
+
+void SiteEngagementUI::BindUIHandler(
+    mojo::InterfaceRequest<SiteEngagementUIHandler> request) {
+  // SiteEngagementUIHandlerImpl deletes itself when the pipe is closed.
+  new SiteEngagementUIHandlerImpl(Profile::FromWebUI(web_ui()), request.Pass());
+}