Improves first run dialog performance on Win8

chrome/browser/ui/webui/set_as_default_browser_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 "chrome/browser/ui/webui/set_as_default_browser_ui.h"

[sky, 2016/07/06 19:21:19]

As this file is win only please name it as such.

[zmin, 2016/07/06 20:04:31]

You mean the name of all three files, not just the browser test file, right?

[sky, 2016/07/06 23:53:16]

Good point. I had only thtought this file was win, but you're right. So, yes,
all three.

[zmin, 2016/07/18 21:12:14]

Done.

+
+#include "base/command_line.h"
+#include "base/win/windows_version.h"
+#include "chrome/browser/ui/browser.h"
+#include "chrome/browser/ui/browser_window.h"
+#include "chrome/common/chrome_switches.h"
+#include "chrome/test/base/in_process_browser_test.h"
+#include "ui/views/widget/widget.h"
+
+class SetAsDefaultBrowserUIBrowserTest : public InProcessBrowserTest {
+ protected:
+  bool IsMainWindowVisible() {

[sky, 2016/07/06 19:21:19]

You shouldn't need a subclass just for this function, create a standalone
function that is passed the browser().

[zmin, 2016/07/06 20:04:31]

Done.

+    return views::Widget::GetWidgetForNativeWindow(
+               browser()->window()->GetNativeWindow())
+        ->IsVisible();
+  }
+};
+
+class SetAsDefaultBrowserUIBrowserTestWithFirstRun
+    : public SetAsDefaultBrowserUIBrowserTest {
+  void SetUpCommandLine(base::CommandLine* command_line) override {
+    InProcessBrowserTest::SetUpCommandLine(command_line);
+    command_line->AppendSwitch(switches::kForceFirstRun);
+  }
+};
+
+IN_PROC_BROWSER_TEST_F(SetAsDefaultBrowserUIBrowserTestWithFirstRun, Test) {
+  // Windows 8 only test case.
+  if (base::win::GetVersion() <= base::win::VERSION_WIN7 ||
+      base::win::GetVersion() >= base::win::VERSION_WIN10) {
+    return;
+  }
+  ASSERT_FALSE(IsMainWindowVisible());
+  views::Widget* dialog_widget =
+      SetAsDefaultBrowserUI::GetDialogWidgetForTesting();
+  EXPECT_NE(nullptr, dialog_widget);

[sky, 2016/07/06 19:21:19]

ASSERT_TRUE(dialog_widget), otherwise if dialog_widget is null the next line
crashes.

[zmin, 2016/07/06 20:04:31]

Done.

+  dialog_widget->CloseNow();
+  ASSERT_TRUE(IsMainWindowVisible());
+}
+
+IN_PROC_BROWSER_TEST_F(SetAsDefaultBrowserUIBrowserTest, TestWithoutFirstRun) {
+  ASSERT_TRUE(IsMainWindowVisible());
+  EXPECT_EQ(nullptr, SetAsDefaultBrowserUI::GetDialogWidgetForTesting());
+}