chromeos: Refactor shelf to create ShelfView earlier in startup

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 <memory>
 #include <utility>
 #include <vector>
@@ skipping 504 matching lines @@
 
   // NOTE: Prefer ScopedRootWindowForNewWindows when setting temporarily.
   void set_root_window_for_new_windows(WmWindow* root) {
     root_window_for_new_windows_ = root;
   }
 
   // Creates instance of FirstRunHelper. Caller is responsible for deleting
   // returned object.
   ash::FirstRunHelper* CreateFirstRunHelper();
 
-  // Creates the ShelfView for each display and populates it with items.
-  // Called after the user session is active and profile is available.
-  void CreateShelfView();
-
   void SetLargeCursorSizeInDip(int large_cursor_size_in_dip);
 
   // Toggles cursor compositing on/off. Native cursor is disabled when cursor
   // compositing is enabled, and vice versa.
   void SetCursorCompositingEnabled(bool enabled);
 
   StickyKeysController* sticky_keys_controller() {
     return sticky_keys_controller_.get();
   }
 
@@ skipping 108 matching lines @@
   // aura::client::ActivationChangeObserver:
   void OnWindowActivated(ActivationReason reason,
                          aura::Window* gained_active,
                          aura::Window* lost_active) override;
 
   // SessionObserver:
   void OnSessionStateChanged(session_manager::SessionState state) override;
   void OnLoginStatusChanged(LoginStatus login_status) override;
   void OnLockStateChanged(bool locked) override;
 
+  // Finalizes the shelf state. Called after the user session is active and
+  // the profile is available.
+  void InitializeShelf();
+
   // Callback for prefs::ConnectToPrefService.
   void OnPrefServiceInitialized(std::unique_ptr<::PrefService> pref_service);
 
   static Shell* instance_;
 
   // Only valid in mash, for classic ash this is null.
   static aura::WindowTreeClient* window_tree_client_;
   static aura::WindowManagerClient* window_manager_client_;
 
   // If set before the Shell is initialized, the mouse cursor will be hidden
@@ skipping 159 matching lines @@
   base::ObserverList<ShellObserver> shell_observers_;
 
   scoped_refptr<base::SequencedWorkerPool> blocking_pool_;
 
   DISALLOW_COPY_AND_ASSIGN(Shell);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SHELL_H_