Reauthenticate the user before launching Smart Lock setup app.

chrome/browser/signin/easy_unlock_service.h

Index: chrome/browser/signin/easy_unlock_service.h
diff --git a/chrome/browser/signin/easy_unlock_service.h b/chrome/browser/signin/easy_unlock_service.h
index 1f256a1691eee1e47eb5007dc61a436a5a56debb..ade435b5bea456df75ad9a3701f28610fda6d4eb 100644
--- a/chrome/browser/signin/easy_unlock_service.h
+++ b/chrome/browser/signin/easy_unlock_service.h
@@ -215,6 +215,12 @@ class EasyUnlockService : public KeyedService {
     return screenlock_state_handler_.get();
   }
 
+  // Saves hardlock state for the given user. Update UI if the currently
+  // associated user is the same.
+  void SetHardlockStateForUser(
+      const std::string& user_id,
+      EasyUnlockScreenlockStateHandler::HardlockState state);
+
  private:
   // A class to detect whether a bluetooth adapter is present.
   class BluetoothDetector;
@@ -231,12 +237,6 @@ class EasyUnlockService : public KeyedService {
   // Callback when Bluetooth adapter present state changes.
   void OnBluetoothAdapterPresentChanged();
 
-  // Saves hardlock state for the given user. Update UI if the currently
-  // associated user is the same.
-  void SetHardlockStateForUser(
-      const std::string& user_id,
-      EasyUnlockScreenlockStateHandler::HardlockState state);
-
 #if defined(OS_CHROMEOS)
   // Callback for get key operation from CheckCryptohomeKeysAndMaybeHardlock.
   void OnCryptohomeKeysFetchedForChecking(