Do not start autoshutdown on lock button press.

ash/wm/session_state_controller.h

 // Copyright (c) 2012 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 ASH_WM_SESSION_STATE_CONTROLLER_H_
 #define ASH_WM_SESSION_STATE_CONTROLLER_H_
 
 #include "ash/ash_export.h"
 #include "ash/shell_observer.h"
 #include "ash/wm/session_state_animator.h"
@@ skipping 135 matching lines @@
   void SetDelegate(SessionStateControllerDelegate* delegate);
 
   // Returns true iff when we're in state when user session can be locked.
   virtual bool IsEligibleForLock();
 
   // Returns true if system is locked.
   virtual bool IsLocked();
 
   // Starts locking (with slow animation) that can be cancelled.
   // After locking and |kLockToShutdownTimeoutMs| StartShutdownAnimation()
-  // will be called unless CancelShutdown() is called.
-  virtual void StartLockAnimation();
+  // will be called unless CancelShutdown() is called, if |shutdown_after_lock|
+  // is true.
+  virtual void StartLockAnimation(bool shutdown_after_lock);
 
   // Starts shutting down (with slow animation) that can be cancelled.
   virtual void StartShutdownAnimation();
 
   // Starts usual lock animation, but locks immediately.
   // Unlike StartLockAnimation it does no lead to StartShutdownAnimation.
   virtual void StartLockAnimationAndLockImmediately();
 
   // Returns true if we have requested system to lock, but haven't received
   // confirmation yet.
@@ skipping 100 matching lines @@
   scoped_ptr<internal::SessionStateAnimator> animator_;
 
   scoped_ptr<SessionStateControllerDelegate> delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(SessionStateController);
 };
 
 }  // namespace ash
 
 #endif  // ASH_WM_SESSION_STATE_CONTROLLER_H_