Add an infobar if a session is being controlled by an automated test.

chrome/browser/ui/startup/chromedriver_infobar_delegate.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/startup/chromedriver_infobar_delegate.h"
+
+#include "chrome/browser/devtools/global_confirm_info_bar.h"
+#include "chrome/browser/ui/browser.h"
+#include "chrome/grit/generated_resources.h"
+#include "components/infobars/core/infobar.h"
+#include "components/strings/grit/components_strings.h"
+#include "ui/base/l10n/l10n_util.h"
+
+// static
+void ChromeDriverInfoBarDelegate::CreateAndShow(Browser* browser) {
+  std::unique_ptr<ChromeDriverInfoBarDelegate> delegate(
+      new ChromeDriverInfoBarDelegate());
+  GlobalConfirmInfoBar::Show(std::move(delegate));
+}
+
+ChromeDriverInfoBarDelegate::ChromeDriverInfoBarDelegate() {}
+
+ChromeDriverInfoBarDelegate::~ChromeDriverInfoBarDelegate() {}
+
+infobars::InfoBarDelegate::InfoBarIdentifier
+ChromeDriverInfoBarDelegate::GetIdentifier() const {
+  return CHROMEDRIVER_INFOBAR_DELEGATE;
+}
+
+base::string16 ChromeDriverInfoBarDelegate::GetMessageText() const {
+  return l10n_util::GetStringUTF16(IDS_CONTROLLED_BY_CHROMEDRIVER);
+}
+
+int ChromeDriverInfoBarDelegate::GetButtons() const {
+  return BUTTON_NONE;
+}
+
+bool ChromeDriverInfoBarDelegate::ShouldExpire(
+    const NavigationDetails& details) const {
+  return false;
+}