Converts remaining usage of WmLayoutManager to aura::LayoutManager

ash/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/wm/workspace/workspace_layout_manager.h"
 
 #include <algorithm>
 
 #include "ash/keyboard/keyboard_observer_register.h"
 #include "ash/public/cpp/shell_window_ids.h"
@@ skipping 324 matching lines @@
     // from fullscreen, the temporarily disabled always-on-top property will be
     // restored.
     return;
   }
 
   UpdateAlwaysOnTop(is_pinned ? pinned_window->aura_window() : nullptr);
 }
 
 void WorkspaceLayoutManager::OnVirtualKeyboardStateChanged(
     bool activated,
-    WmWindow* root_window) {
-  UpdateKeyboardObserverFromStateChanged(
-      activated, root_window, WmWindow::Get(root_window_), &keyboard_observer_);
+    aura::Window* root_window) {
+  UpdateKeyboardObserverFromStateChanged(activated, root_window, root_window_,
+                                         &keyboard_observer_);
 }
 
 //////////////////////////////////////////////////////////////////////////////
 // WorkspaceLayoutManager, private:
 
 void WorkspaceLayoutManager::AdjustAllWindowsBoundsForWorkAreaChange(
     const wm::WMEvent* event) {
   DCHECK(event->type() == wm::WM_EVENT_DISPLAY_BOUNDS_CHANGED ||
          event->type() == wm::WM_EVENT_WORKAREA_BOUNDS_CHANGED);
 
@@ skipping 45 matching lines @@
   for (aura::Window* window : windows) {
     wm::WindowState* window_state = wm::GetWindowState(window);
     if (window_on_top)
       window_state->DisableAlwaysOnTop(WmWindow::Get(window_on_top));
     else
       window_state->RestoreAlwaysOnTop();
   }
 }
 
 }  // namespace ash