mash: Convert shelf to wm::WmWindow types, part 1

ash/shell.cc

 // 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.
 
 #include "ash/shell.h"
 
 #include <algorithm>
 #include <string>
 #include <utility>
 
@@ skipping 428 matching lines @@
 }
 
 void Shell::OnRootWindowAdded(aura::Window* root_window) {
   FOR_EACH_OBSERVER(ShellObserver, observers_, OnRootWindowAdded(root_window));
 }
 
 void Shell::CreateShelf() {
   RootWindowControllerList controllers = GetAllRootWindowControllers();
   for (RootWindowControllerList::iterator iter = controllers.begin();
        iter != controllers.end(); ++iter)
-    (*iter)->shelf_widget()->CreateShelf();
+    (*iter)->CreateShelf();
 }
 
 void Shell::OnShelfCreatedForRootWindow(aura::Window* root_window) {
   FOR_EACH_OBSERVER(ShellObserver,
                     observers_,
                     OnShelfCreatedForRootWindow(root_window));
 }
 
 void Shell::CreateKeyboard() {
   if (in_mus_)
@@ skipping 807 matching lines @@
 
 void Shell::OnWindowActivated(
     aura::client::ActivationChangeObserver::ActivationReason reason,
     aura::Window* gained_active,
     aura::Window* lost_active) {
   if (gained_active)
     target_root_window_ = gained_active->GetRootWindow();
 }
 
 }  // namespace ash