Add a chrome://webapks page.

chrome/browser/ui/webui/webapks_ui.cc

+// 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.
+
+#include "chrome/browser/ui/webui/webapks_ui.h"
+
+#include <string>
+#include <unordered_set>
+
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/ui/webui/webapks_handler.h"
+#include "chrome/common/url_constants.h"
+#include "chrome/grit/webapks_ui_resources.h"
+#include "components/grit/components_resources.h"
+#include "content/public/browser/web_ui.h"
+#include "content/public/browser/web_ui_data_source.h"
+
+using content::WebUIDataSource;
+
+namespace {
+
+WebUIDataSource* CreateWebApksUIDataSource() {
+  WebUIDataSource* html_source =
+      WebUIDataSource::Create(chrome::kChromeUIWebApksHost);
+  html_source->SetJsonPath("strings.js");
+  html_source->AddResourcePath("webapks.js", IDR_WEBAPKS_UI_JS);
+  html_source->AddResourcePath("about_webapks.css", IDR_WEBAPKS_UI_CSS);
+  html_source->SetDefaultResource(IDR_WEBAPKS_UI_HTML);
+  html_source->UseGzip(std::unordered_set<std::string>());
+
+  return html_source;
+}
+
+}  // anonymous namespace
+
+WebApksUI::WebApksUI(content::WebUI* web_ui)
+    : content::WebUIController(web_ui) {
+  Profile* profile = Profile::FromWebUI(web_ui);
+  web_ui->AddMessageHandler(base::MakeUnique<WebApksHandler>());
+  WebUIDataSource::Add(profile, CreateWebApksUIDataSource());
+}
+
+WebApksUI::~WebApksUI() {}