Moves couple of WmShell methods to standalone functions

ash/common/wm/workspace/workspace_layout_manager.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/common/wm/workspace/workspace_layout_manager.h"
 
 #include <algorithm>
 
 #include "ash/common/keyboard/keyboard_observer_register.h"
 #include "ash/common/session/session_controller.h"
 #include "ash/common/shelf/wm_shelf.h"
 #include "ash/common/wm/always_on_top_controller.h"
 #include "ash/common/wm/fullscreen_window_finder.h"
 #include "ash/common/wm/window_positioner.h"
 #include "ash/common/wm/window_state.h"
 #include "ash/common/wm/wm_event.h"
 #include "ash/common/wm/wm_screen_util.h"
 #include "ash/common/wm/workspace/workspace_layout_manager_backdrop_delegate.h"
 #include "ash/common/wm_shell.h"
 #include "ash/common/wm_window.h"
 #include "ash/public/cpp/shell_window_ids.h"
 #include "ash/root_window_controller.h"
 #include "ash/shell.h"
 #include "ash/wm/screen_pinning_controller.h"
 #include "ash/wm/window_properties.h"
 #include "ash/wm/window_state_aura.h"
+#include "ash/wm/window_util.h"
 #include "base/command_line.h"
 #include "ui/aura/client/aura_constants.h"
 #include "ui/base/ui_base_switches.h"
 #include "ui/compositor/layer.h"
 #include "ui/display/display.h"
 #include "ui/display/screen.h"
 #include "ui/keyboard/keyboard_controller.h"
 #include "ui/keyboard/keyboard_controller_observer.h"
 #include "ui/wm/public/activation_client.h"
 
@@ skipping 100 matching lines @@
     const gfx::Rect& new_bounds) {
   // If new window behavior flag enabled and in non-sticky mode, do not change
   // the work area.
   bool change_work_area =
       (!base::CommandLine::ForCurrentProcess()->HasSwitch(
            ::switches::kUseNewVirtualKeyboardBehavior) ||
        keyboard::KeyboardController::GetInstance()->keyboard_locked());
   if (!change_work_area)
     return;
 
-  WmWindow* window = shell_->GetActiveWindow();
+  WmWindow* window = WmWindow::Get(wm::GetActiveWindow());
   if (!window)
     return;
 
   window = window->GetToplevelWindow();
   if (!window_->Contains(window))
     return;
 
   wm::WindowState* window_state = window->GetWindowState();
   if (window_state->ignore_keyboard_bounds_change())
     return;
@@ skipping 238 matching lines @@
   for (auto* window : windows) {
     wm::WindowState* window_state = window->GetWindowState();
     if (window_on_top)
       window_state->DisableAlwaysOnTop(window_on_top);
     else
       window_state->RestoreAlwaysOnTop();
   }
 }
 
 }  // namespace ash