[mus+ash] Removes WmWindow from ash/wm/root_window_finder.h

ash/shell_port.cc

 // Copyright 2016 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_port.h"
 
 #include <utility>
 
 #include "ash/accelerators/accelerator_controller.h"
 #include "ash/public/cpp/shell_window_ids.h"
@@ skipping 29 matching lines @@
 void ShellPort::Shutdown() {}
 
 void ShellPort::ShowContextMenu(const gfx::Point& location_in_screen,
                                 ui::MenuSourceType source_type) {
   // Bail if there is no active user session or if the screen is locked.
   if (Shell::Get()->session_controller()->NumberOfLoggedInUsers() < 1 ||
       Shell::Get()->session_controller()->IsScreenLocked()) {
     return;
   }
 
-  WmWindow* root = wm::GetRootWindowAt(location_in_screen);
-  root->GetRootWindowController()->ShowContextMenu(location_in_screen,
-                                                   source_type);
+  aura::Window* root = wm::GetRootWindowAt(location_in_screen);
+  RootWindowController::ForWindow(root)->ShowContextMenu(location_in_screen,
+                                                         source_type);
 }
 
 void ShellPort::OnLockStateEvent(LockStateObserver::EventType event) {
   for (auto& observer : lock_state_observers_)
     observer.OnLockStateEvent(event);
 }
 
 void ShellPort::AddLockStateObserver(LockStateObserver* observer) {
   lock_state_observers_.AddObserver(observer);
 }
@@ skipping 49 matching lines @@
     }
   }
   for (aura::Window* root_window : root_windows) {
     RootWindowController::ForWindow(root_window)
         ->GetSystemModalLayoutManager(removed)
         ->DestroyModalBackground();
   }
 }
 
 }  // namespace ash