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

ash/shelf/shelf_layout_manager.cc

Index: ash/shelf/shelf_layout_manager.cc
diff --git a/ash/shelf/shelf_layout_manager.cc b/ash/shelf/shelf_layout_manager.cc
index a5d6bc3e71164386691f891d82c285758bdd06f6..24e92f1e20004945f37de15fb5698526344c8075 100644
--- a/ash/shelf/shelf_layout_manager.cc
+++ b/ash/shelf/shelf_layout_manager.cc
@@ -411,7 +411,7 @@ void ShelfLayoutManager::OnShelfAutoHideBehaviorChanged(WmWindow* root_window) {
   UpdateVisibilityState();
 }
 
-void ShelfLayoutManager::OnPinnedStateChanged(WmWindow* pinned_window) {
+void ShelfLayoutManager::OnPinnedStateChanged(aura::Window* pinned_window) {
   // Shelf needs to be hidden on entering to pinned mode, or restored
   // on exiting from pinned mode.
   UpdateVisibilityState();