Add a Browser Task Scheduler Chrome Internals Page

chrome/browser/ui/webui/task_scheduler_internals_ui_browsertest.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 "base/macros.h"
+#include "base/strings/utf_string_conversions.h"
+#include "chrome/browser/ui/browser.h"
+#include "chrome/browser/ui/tabs/tab_strip_model.h"
+#include "chrome/common/url_constants.h"
+#include "chrome/test/base/ui_test_utils.h"
+#include "chrome/test/base/web_ui_browser_test.h"
+#include "content/public/browser/web_contents.h"
+#include "ui/base/window_open_disposition.h"
+
+class TaskSchedulerInternalsWebUIBrowserTest : public WebUIBrowserTest {
+ public:
+  TaskSchedulerInternalsWebUIBrowserTest() = default;
+  ~TaskSchedulerInternalsWebUIBrowserTest() override = default;
+
+  void SetUpOnMainThread() override {
+    WebUIBrowserTest::SetUpOnMainThread();
+    std::string url_string("chrome://");

[Dan Beam, 2016/09/23 18:09:00]

nit: why not use kChromeUIScheme here?

[robliao, 2016/09/23 21:45:10]

Done.

+    url_string += chrome::kChromeUITaskSchedulerInternalsHost;
+    ui_test_utils::NavigateToURLWithDisposition(
+        browser(),
+        GURL(url_string),
+        WindowOpenDisposition::CURRENT_TAB,
+        ui_test_utils::BROWSER_TEST_WAIT_FOR_NAVIGATION);
+  }
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(TaskSchedulerInternalsWebUIBrowserTest);
+};
+
+// Test that navigation to the internals page works.
+IN_PROC_BROWSER_TEST_F(TaskSchedulerInternalsWebUIBrowserTest, Navigate) {
+  EXPECT_EQ(base::ASCIIToUTF16("Task Scheduler Internals"),
+            browser()->tab_strip_model()->GetActiveWebContents()->GetTitle());
+}