Chrome OS: avoid suspending on lid close when casting is active.

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_
 
 #include <utility>
 #include <vector>
 
@@ skipping 266 matching lines @@
   // TODO(oshima): Investigate if we can merge this and |OnLoginStateChanged|.
   void UpdateAfterLoginStatusChange(user::LoginStatus status);
 
   // Called when the application is exiting.
   void OnAppTerminating();
 
   // Called when the screen is locked (after the lock window is visible) or
   // unlocked.
   void OnLockStateChanged(bool locked);
 
+  // Called when a screen sharing session is started or stopped.
+  void OnScreenSharingStateChanged(bool started);
+
   // Initializes |shelf_|.  Does nothing if it's already initialized.
   void CreateShelf();
 
   // Creates virtual keyboard. Deletes the old virtual keyboard if it's already
   // exist.
   void CreateKeyboard();
 
   // Show shelf view if it was created hidden (before session has started).
   void ShowShelf();
 
@@ skipping 405 matching lines @@
   bool simulate_modal_window_open_for_testing_;
 
   bool is_touch_hud_projection_enabled_;
 
   DISALLOW_COPY_AND_ASSIGN(Shell);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SHELL_H_