Add chrome://popular-sites-internals/ to iOS.

ios/chrome/browser/ui/webui/popular_sites_internals_ui.cc

+// Copyright 2016 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 "ios/chrome/browser/ui/webui/popular_sites_internals_ui.h"
+
+#include "components/grit/components_resources.h"
+#include "components/ntp_tiles/popular_sites.h"
+#include "components/ntp_tiles/webui/popular_sites_internals_message_handler.h"
+#include "components/ntp_tiles/webui/popular_sites_internals_message_handler_client.h"
+#include "ios/chrome/browser/browser_state/chrome_browser_state.h"
+#include "ios/chrome/browser/chrome_url_constants.h"
+#include "ios/chrome/browser/ntp_tiles/ios_popular_sites_factory.h"
+#include "ios/web/public/web_thread.h"
+#include "ios/web/public/web_ui_ios_data_source.h"
+#include "ios/web/public/webui/web_ui_ios.h"
+#include "ios/web/public/webui/web_ui_ios_message_handler.h"
+
+namespace {
+
+// The implementation for the chrome://popular-sites-internals page.
+class IOSPopularSitesInternalsMessageHandlerBridge
+    : public web::WebUIIOSMessageHandler,
+      public ntp_tiles::PopularSitesInternalsMessageHandlerClient {
+ public:
+  IOSPopularSitesInternalsMessageHandlerBridge() : handler_(this) {}
+
+ private:
+  // web::WebUIIOSMessageHandler:
+  void RegisterMessages() override;
+
+  // ntp_tiles::PopularSitesInternalsMessageHandlerClient
+  base::SequencedWorkerPool* GetBlockingPool() override;
+  std::unique_ptr<ntp_tiles::PopularSites> MakePopularSites() override;
+  PrefService* GetPrefs() override;
+  void RegisterMessageCallback(
+      const std::string& message,
+      const base::Callback<void(const base::ListValue*)>& callback) override;
+  void CallJavascriptFunctionVector(
+      const std::string& name,
+      const std::vector<const base::Value*>& values) override;
+
+  ntp_tiles::PopularSitesInternalsMessageHandler handler_;
+
+  DISALLOW_COPY_AND_ASSIGN(IOSPopularSitesInternalsMessageHandlerBridge);
+};
+
+void IOSPopularSitesInternalsMessageHandlerBridge::RegisterMessages() {
+  handler_.RegisterMessages();
+}
+
+base::SequencedWorkerPool*
+IOSPopularSitesInternalsMessageHandlerBridge::GetBlockingPool() {
+  return web::WebThread::GetBlockingPool();
+}
+
+std::unique_ptr<ntp_tiles::PopularSites>
+IOSPopularSitesInternalsMessageHandlerBridge::MakePopularSites() {
+  return IOSPopularSitesFactory::NewForBrowserState(
+      ios::ChromeBrowserState::FromWebUIIOS(web_ui()));
+}
+
+PrefService* IOSPopularSitesInternalsMessageHandlerBridge::GetPrefs() {
+  return ios::ChromeBrowserState::FromWebUIIOS(web_ui())->GetPrefs();
+}
+
+void IOSPopularSitesInternalsMessageHandlerBridge::RegisterMessageCallback(
+    const std::string& message,
+    const base::Callback<void(const base::ListValue*)>& callback) {
+  web_ui()->RegisterMessageCallback(message, callback);
+}
+
+void IOSPopularSitesInternalsMessageHandlerBridge::CallJavascriptFunctionVector(
+    const std::string& name,
+    const std::vector<const base::Value*>& values) {
+  web_ui()->CallJavascriptFunction(name, values);
+}
+
+}  // namespace
+
+web::WebUIIOSDataSource* CreatePopularSitesInternalsHTMLSource() {
+  web::WebUIIOSDataSource* source =
+      web::WebUIIOSDataSource::Create(kChromeUIPopularSitesInternalsHost);
+
+  source->AddResourcePath("popular_sites_internals.js",
+                          IDR_POPULAR_SITES_INTERNALS_JS);
+  source->AddResourcePath("popular_sites_internals.css",
+                          IDR_POPULAR_SITES_INTERNALS_CSS);
+  source->SetDefaultResource(IDR_POPULAR_SITES_INTERNALS_HTML);
+  return source;
+}
+
+PopularSitesInternalsUI::PopularSitesInternalsUI(web::WebUIIOS* web_ui)
+    : web::WebUIIOSController(web_ui) {
+  web::WebUIIOSDataSource::Add(ios::ChromeBrowserState::FromWebUIIOS(web_ui),
+                               CreatePopularSitesInternalsHTMLSource());
+  web_ui->AddMessageHandler(new IOSPopularSitesInternalsMessageHandlerBridge);
+}
+
+PopularSitesInternalsUI::~PopularSitesInternalsUI() {}