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

chrome/browser/ui/startup/automation_infobar_delegate.cc

Index: chrome/browser/ui/startup/automation_infobar_delegate.cc
diff --git a/chrome/browser/ui/startup/automation_infobar_delegate.cc b/chrome/browser/ui/startup/automation_infobar_delegate.cc
new file mode 100644
index 0000000000000000000000000000000000000000..c7da2cdb71503bb4ffb6620c1bba21da9a021e5d
--- /dev/null
+++ b/chrome/browser/ui/startup/automation_infobar_delegate.cc
@@ -0,0 +1,41 @@
+// 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/automation_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 AutomationInfoBarDelegate::Create() {
+  std::unique_ptr<ConfirmInfoBarDelegate> delegate(
+      new AutomationInfoBarDelegate());
+  GlobalConfirmInfoBar::Show(std::move(delegate));
+}
+
+AutomationInfoBarDelegate::AutomationInfoBarDelegate() {}
+
+AutomationInfoBarDelegate::~AutomationInfoBarDelegate() {}
+
+infobars::InfoBarDelegate::InfoBarIdentifier
+AutomationInfoBarDelegate::GetIdentifier() const {
+  return AUTOMATION_INFOBAR_DELEGATE;
+}
+
+bool AutomationInfoBarDelegate::ShouldExpire(
+    const NavigationDetails& details) const {
+  return false;
+}
+
+base::string16 AutomationInfoBarDelegate::GetMessageText() const {
+  return l10n_util::GetStringUTF16(IDS_CONTROLLED_BY_AUTOMATION);
+}
+
+int AutomationInfoBarDelegate::GetButtons() const {
+  return BUTTON_NONE;
+}