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diff --git a/chrome/browser/auto_launch_trial.h b/chrome/browser/auto_launch_trial.h
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+// Copyright (c) 2011 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.
+
+#ifndef CHROME_BROWSER_AUTO_LAUNCH_TRIAL_H_
+#define CHROME_BROWSER_AUTO_LAUNCH_TRIAL_H_
+#pragma once
+
+// Strings used with the "auto launching Chrome at computer startup" trial.  If
+// the field trial is running then...
+// base::FieldTrialList::TrialExists(kAutoLaunchTrial_Name) returns true.
+//
+// The field trial consists of two groups of users: those that auto-launch
+// Chrome at startup and those that don't.  The group_name() of the field
+// trial object is used to determine the group that the user belongs to.
+//
+// The field trial is setup in ChromeBrowserMainParts::AutoLaunchFieldTrial()
+// based on the user's brand code:
+//
+//   - brand RNGP auto launches Chrome on computer startup.
+//   - brand RNGQ does not.
+//   - any other brand code does whatever comes natural to it.
+
+extern const char kAutoLaunchTrialName[];
+extern const char kAutoLaunchTrialAutoLaunchGroup[];
+extern const char kAutoLaunchTrialControlGroup[];
+
+namespace auto_launch_trial {
+
+// The possible responses for the auto-launch infobar.
+enum InfobarMetricResponse {
+  INFOBAR_CUT_IT_OUT = 0,
+  INFOBAR_OK,
+  INFOBAR_IGNORE,
+};
+
+// Whether the auto-launch experiment is active and the user is part of it.
+bool IsInAutoLaunchGroup();
+
+// Updates UMA to reflect user changing the auto-launch setting.
+void UpdateToggleAutoLaunchMetric(bool auto_launch);
+
+// Updates UMA to reflect user responses to the infobar.
+void UpdateInfobarResponseMetric(InfobarMetricResponse response);
+
+// Updates UMA to reflect that the infobar has been shown.
+void UpdateInfobarShownMetric();
+
+}  // namespace auto_launch_trial
+
+#endif  // CHROME_BROWSER_AUTO_LAUNCH_TRIAL_H_