mash: Create and show a shelf in mash.

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 251 matching lines @@
 
   virtual std::unique_ptr<wm::MaximizeModeEventHandler>
   CreateMaximizeModeEventHandler() = 0;
 
   virtual std::unique_ptr<ScopedDisableInternalMouseAndKeyboard>
   CreateScopedDisableInternalMouseAndKeyboard() = 0;
 
   virtual std::unique_ptr<WmImmersiveFullscreenController>
   CreateImmersiveFullscreenController() = 0;
 
+  void CreateShelfDelegate();
+
   // Called after maximize mode has started, windows might still animate though.
   void OnMaximizeModeStarted();
 
   // Called after maximize mode has ended, windows might still be returning to
   // 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;
@@ skipping 67 matching lines @@
     return &shell_observers_;
   }
 
   void SetKeyboardUI(std::unique_ptr<KeyboardUI> keyboard_ui);
 
   // Helpers to set (and initialize) or destroy various delegates.
   // TODO(msw|jamescook): Remove these once ShellDelegate, etc. are ported.
   void SetSystemTrayDelegate(std::unique_ptr<SystemTrayDelegate> delegate);
   void DeleteSystemTrayDelegate();
 
-  void CreateShelfDelegate();
-
   void DeleteWindowCycleController();
 
   void DeleteWindowSelectorController();
 
   void CreateMaximizeModeController();
   void DeleteMaximizeModeController();
 
   void CreateMruWindowTracker();
   void DeleteMruWindowTracker();
 
@@ skipping 42 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_