Revert of Reland: chromeos: Fix shelf appearing at login screen under mash

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 255 matching lines @@
           contains, insets)) {
     return;
   }
 }
 
 void Shell::OnLoginStateChanged(LoginStatus status) {
   for (auto& observer : *wm_shell_->shell_observers())
     observer.OnLoginStateChanged(status);
 }
 
+void Shell::OnLoginUserProfilePrepared() {
+  wm_shell_->CreateShelf();
+  CreateKeyboard();
+}
+
 void Shell::OnAppTerminating() {
   for (auto& observer : *wm_shell_->shell_observers())
     observer.OnAppTerminating();
 }
 
 void Shell::OnLockStateChanged(bool locked) {
   for (auto& observer : *wm_shell_->shell_observers())
     observer.OnLockStateChanged(locked);
 #ifndef NDEBUG
   // Make sure that there is no system modal in Lock layer when unlocked.
@@ skipping 563 matching lines @@
 std::unique_ptr<ui::EventTargetIterator> Shell::GetChildIterator() const {
   return std::unique_ptr<ui::EventTargetIterator>();
 }
 
 ui::EventTargeter* Shell::GetEventTargeter() {
   NOTREACHED();
   return nullptr;
 }
 
 }  // namespace ash