[mus+ash] Removes WmWindow from ash/wm/mru_window_tracker and overview mode

chrome/browser/ui/ash/multi_user/user_switch_animator_chromeos.cc

Index: chrome/browser/ui/ash/multi_user/user_switch_animator_chromeos.cc
diff --git a/chrome/browser/ui/ash/multi_user/user_switch_animator_chromeos.cc b/chrome/browser/ui/ash/multi_user/user_switch_animator_chromeos.cc
index 14e5c1223daeef25e0ba479c6932b38bb1cc6f1f..7470b3d027a01dddba37d84e3145a544e30fbd4c 100644
--- a/chrome/browser/ui/ash/multi_user/user_switch_animator_chromeos.cc
+++ b/chrome/browser/ui/ash/multi_user/user_switch_animator_chromeos.cc
@@ -364,8 +364,8 @@ void UserSwitchAnimatorChromeOS::TransitionWindows(
     }
     case ANIMATION_STEP_FINALIZE: {
       // Reactivate the MRU window of the new user.
-      aura::Window::Windows mru_list = ash::WmWindow::ToAuraWindows(
-          ash::Shell::Get()->mru_window_tracker()->BuildMruWindowList());
+      aura::Window::Windows mru_list =
+          ash::Shell::Get()->mru_window_tracker()->BuildMruWindowList();
       if (!mru_list.empty()) {
         aura::Window* window = mru_list[0];
         ash::wm::WindowState* window_state = ash::wm::GetWindowState(window);