Removes example code that isn't correctly wired up

ash/mus/window_manager.cc

 // Copyright 2015 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/mus/window_manager.h"
 
 #include <stdint.h>
 
 #include <utility>
 
@@ skipping 124 matching lines @@
 
   shell_.reset(new WmShellMus(base::MakeUnique<ShellDelegateMus>(connector_),
                               this, pointer_watcher_event_router_.get()));
   shell_->Initialize(blocking_pool);
   lookup_.reset(new WmLookupMus);
 
   // TODO: this should be called when logged in. See http://crbug.com/654606.
   shell_->CreateShelf();
 }
 
-void WindowManager::SetScreenLocked(bool is_locked) {
-  // TODO: screen locked state needs to be persisted for newly added displays.
-  for (auto& root_window_controller : root_window_controllers_) {
-    WmWindowMus* non_lock_screen_containers_container =
-        root_window_controller->GetWindowByShellWindowId(
-            kShellWindowId_NonLockScreenContainersContainer);
-    if (is_locked)
-      non_lock_screen_containers_container->aura_window()->Hide();
-    else
-      non_lock_screen_containers_container->aura_window()->Show();
-  }
-}
-
 aura::Window* WindowManager::NewTopLevelWindow(
     ui::mojom::WindowType window_type,
     std::map<std::string, std::vector<uint8_t>>* properties) {
   RootWindowController* root_window_controller =
       GetRootWindowControllerForNewTopLevelWindow(properties);
   aura::Window* window =
       root_window_controller->NewTopLevelWindow(window_type, properties);
   if (properties->count(
           ui::mojom::WindowManager::kWindowIgnoredByShelf_Property)) {
     wm::WindowState* window_state =
@@ skipping 345 matching lines @@
 
 void WindowManager::OnWindowInitialized(aura::Window* window) {
   // This ensures WmWindowAura won't be called before WmWindowMus. This is
   // important as if WmWindowAura::Get() is called first, then WmWindowAura
   // would be created, not WmWindowMus.
   WmWindowMus::Get(window);
 }
 
 }  // namespace mus
 }  // namespace ash