Cancel partial screenshot UI when lock happens.

ash/shell.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_SHELL_H_
 #define ASH_SHELL_H_
 #pragma once
 
 #include <utility>
 #include <vector>
@@ skipping 155 matching lines @@
   // Rotates focus through containers that can receive focus.
   void RotateFocus(Direction direction);
 
   // Sets the work area insets of the monitor that contains |window|,
   // this notifies observers too.
   // TODO(sky): this no longer really replicates what happens and is unreliable.
   // Remove this.
   void SetMonitorWorkAreaInsets(aura::Window* window,
                                 const gfx::Insets& insets);
 
+  // Called when the user logs in.
+  void OnLoginStateChange(bool logged_in, bool is_guest);
+
+  // Called when the application is exiting.
+  void OnExit();
+
+  // Called when the screen is locked (after the lock window is visible) or
+  // unlocked.
+  void OnLockStateChange(bool locked);
+
   // Initializes |launcher_|.  Does nothing if it's already initialized.
   void CreateLauncher();
 
   // Adds/removes observer.
   void AddShellObserver(ShellObserver* observer);
   void RemoveShellObserver(ShellObserver* observer);
 
 #if !defined(OS_MACOSX)
   AcceleratorController* accelerator_controller() {
     return accelerator_controller_.get();
@@ skipping 173 matching lines @@
 
   // Used by ash/shell.
   content::BrowserContext* browser_context_;
 
   DISALLOW_COPY_AND_ASSIGN(Shell);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SHELL_H_