[mus+ash] Removes WmWindow from screen_dimmer and video_detector

chrome/browser/chromeos/accessibility/accessibility_manager.cc

Index: chrome/browser/chromeos/accessibility/accessibility_manager.cc
diff --git a/chrome/browser/chromeos/accessibility/accessibility_manager.cc b/chrome/browser/chromeos/accessibility/accessibility_manager.cc
index 7a42effcb3c277ff3931fb9b347dcf08ed2bf8d1..c16dfecee86eaa2ba0033602300b119640eeada0 100644
--- a/chrome/browser/chromeos/accessibility/accessibility_manager.cc
+++ b/chrome/browser/chromeos/accessibility/accessibility_manager.cc
@@ -1276,9 +1276,8 @@ void AccessibilityManager::ActiveUserChanged(
   SetProfile(ProfileManager::GetActiveUserProfile());
 }
 
-void AccessibilityManager::OnFullscreenStateChanged(
-    bool is_fullscreen,
-    ash::WmWindow* root_window) {
+void AccessibilityManager::OnFullscreenStateChanged(bool is_fullscreen,
+                                                    aura::Window* root_window) {
   if (chromevox_panel_)
     chromevox_panel_->UpdateWidgetBounds();
 }