Add a Browser Task Scheduler Chrome Internals Page

chrome/browser/ui/webui/task_scheduler_internals/task_scheduler_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 "chrome/browser/ui/webui/task_scheduler_internals/task_scheduler_internals_ui.h"
+
+#include "base/task_scheduler/task_scheduler.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/common/url_constants.h"
+#include "chrome/grit/task_scheduler_internals_resources.h"
+#include "content/public/browser/web_ui_data_source.h"
+
+TaskSchedulerInternalsUI::TaskSchedulerInternalsUI(content::WebUI* web_ui)
+    : content::WebUIController(web_ui) {
+  content::WebUIDataSource* html_source =
+      content::WebUIDataSource::Create(
+          chrome::kChromeUITaskSchedulerInternalsHost);
+
+  html_source->AddString("status", base::TaskScheduler::GetInstance()
+      ? "Instantiated"
+      : "Not Instantiated");
+
+  html_source->SetDefaultResource(
+      IDR_TASK_SCHEDULER_INTERNALS_RESOURCES_INDEX_HTML);
+
+  content::WebUIDataSource::Add(Profile::FromWebUI(web_ui), html_source);
+}
+
+TaskSchedulerInternalsUI::~TaskSchedulerInternalsUI() = default;