Ensure default dialog button focus remains after a dialog update.

chrome/browser/ui/views/extensions/extension_install_dialog_view_browsertest.cc

 // Copyright 2014 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/views/extensions/extension_install_dialog_view.h"
 
 #include <utility>
 
 #include "base/macros.h"
 #include "base/run_loop.h"
@@ skipping 198 matching lines @@
 IN_PROC_BROWSER_TEST_F(ExtensionInstallDialogViewTest, InstallButtonDelay) {
   ExtensionInstallDialogView::SetInstallButtonDelayForTesting(0);
   ExtensionInstallPromptTestHelper helper;
   views::DialogDelegateView* delegate_view = CreateAndShowPrompt(&helper);
 
   // Check that dialog is visible.
   EXPECT_TRUE(delegate_view->visible());
 
   // Check initial button states.
   EXPECT_FALSE(delegate_view->IsDialogButtonEnabled(ui::DIALOG_BUTTON_OK));
   EXPECT_TRUE(delegate_view->IsDialogButtonEnabled(ui::DIALOG_BUTTON_CANCEL));

[Devlin, 2017/04/07 18:13:04]

Let's add that focus check here, too (the cancel button should be focused each
time).

[Ackerman, 2017/04/12 18:45:28]

Done.

 
   // Check OK button state after timeout to verify that it is re-enabled.
   base::RunLoop().RunUntilIdle();
   EXPECT_TRUE(delegate_view->IsDialogButtonEnabled(ui::DIALOG_BUTTON_OK));
+
+  // Ensure default button (cancel) has focus.
+  EXPECT_TRUE(delegate_view->GetInitiallyFocusedView()->HasFocus());
   delegate_view->Close();
 }