mash: Remove WorkspaceLayoutManagerDelegate.

ash/common/wm_shell.h

 // Copyright 2016 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_COMMON_WM_SHELL_H_
 #define ASH_COMMON_WM_SHELL_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 265 matching lines @@
   // their original position.
   void OnMaximizeModeEnded();
 
   // Called when the overview mode is about to be started (before the windows
   // get re-arranged).
   virtual void OnOverviewModeStarting() = 0;
 
   // Called after overview mode has ended.
   virtual void OnOverviewModeEnded() = 0;
 
+  // Notifies observers after toggling fullscreen mode in |root_window|.
+  void NotifyFullscreenStateChanged(bool is_fullscreen, WmWindow* root_window);
+
   // Notifies |observers_| when entering or exiting pinned mode for
   // |pinned_window|. Entering or exiting can be checked by looking at
   // |pinned_window|'s window state.
   void NotifyPinnedStateChanged(WmWindow* pinned_window);
 
   // Called when virtual keyboard has been activated/deactivated.
   void OnVirtualKeyboardActivated(bool activated);
 
   virtual SessionStateDelegate* GetSessionStateDelegate() = 0;
 
@@ skipping 100 matching lines @@
   bool simulate_modal_window_open_for_testing_ = false;
 
 #if defined(OS_CHROMEOS)
   std::unique_ptr<LogoutConfirmationController> logout_confirmation_controller_;
 #endif
 };
 
 }  // namespace ash
 
 #endif  // ASH_COMMON_WM_SHELL_H_