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diff --git a/chrome/browser/views/sync/sync_setup_wizard.h b/chrome/browser/views/sync/sync_setup_wizard.h
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+++ b/chrome/browser/views/sync/sync_setup_wizard.h
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+// Copyright (c) 2006-2008 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_VIEWS_SYNC_SYNC_SETUP_WIZARD_H_
+#define CHROME_BROWSER_VIEWS_SYNC_SYNC_SETUP_WIZARD_H_
+
+#include "base/basictypes.h"
+
+class SyncSetupFlowContainer;
+
+class ProfileSyncService;
+
+class SyncSetupWizard {
+ public:
+  enum State {
+    GAIA_LOGIN = 0,
+    GAIA_SUCCESS,
+    MERGE_AND_SYNC,
+    DONE
+  };
+
+  explicit SyncSetupWizard(ProfileSyncService* service);
+  ~SyncSetupWizard();
+
+  // Advances the wizard to the specified state if possible, or opens a
+  // new dialog starting at |advance_state|.  If the wizard has never ran
+  // through to completion, it will always attempt to do so.  Otherwise, e.g
+  // for a transient auth failure, it will just run as far as is necessary
+  // based on |advance_state| (so for auth failure, up to GAIA_SUCCESS).
+  void Step(State advance_state);
+
+  // Whether or not a dialog is currently showing.  Useful to determine
+  // if various buttons in the UI should be enabled or disabled.
+  bool IsVisible() const;
+
+ private:
+  // If we just need to pop open an individual dialog, say to collect
+  // gaia credentials in the event of a steady-state auth failure, this is
+  // a "discrete" run (as in not a continuous wizard flow).  This returns
+  // the end state to pass to Run for a given |start_state|.
+  static State GetEndStateForDiscreteRun(State start_state);
+
+  ProfileSyncService* service_;
+  SyncSetupFlowContainer* flow_container_;
+
+  DISALLOW_COPY_AND_ASSIGN(SyncSetupWizard);
+};
+
+#endif  // CHROME_BROWSER_VIEWS_SYNC_SYNC_SETUP_WIZARD_H_