Fixes bug in WmWindowAura::OnWindowVisibilityChanged()

ash/aura/wm_window_aura.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/aura/wm_window_aura.h"
 
 #include "ash/aura/aura_layout_manager_adapter.h"
 #include "ash/aura/wm_root_window_controller_aura.h"
 #include "ash/aura/wm_shell_aura.h"
 #include "ash/common/ash_constants.h"
@@ skipping 839 matching lines @@
 void WmWindowAura::OnWindowDestroying(aura::Window* window) {
   FOR_EACH_OBSERVER(WmWindowObserver, observers_, OnWindowDestroying(this));
 }
 
 void WmWindowAura::OnWindowDestroyed(aura::Window* window) {
   FOR_EACH_OBSERVER(WmWindowObserver, observers_, OnWindowDestroyed(this));
 }
 
 void WmWindowAura::OnWindowVisibilityChanging(aura::Window* window,
                                               bool visible) {
+  DCHECK_EQ(window, window_);
   FOR_EACH_OBSERVER(WmWindowObserver, observers_,
                     OnWindowVisibilityChanging(this, visible));
 }
 
 void WmWindowAura::OnWindowVisibilityChanged(aura::Window* window,
                                              bool visible) {
   FOR_EACH_OBSERVER(WmWindowObserver, observers_,
-                    OnWindowVisibilityChanged(this, visible));
+                    OnWindowVisibilityChanged(Get(window), visible));
 }
 
 void WmWindowAura::OnWindowTitleChanged(aura::Window* window) {
   FOR_EACH_OBSERVER(WmWindowObserver, observers_, OnWindowTitleChanged(this));
 }
 
 void WmWindowAura::OnTransientChildAdded(aura::Window* window,
                                          aura::Window* transient) {
   FOR_EACH_OBSERVER(WmTransientWindowObserver, transient_observers_,
                     OnTransientChildAdded(this, Get(transient)));
 }
 
 void WmWindowAura::OnTransientChildRemoved(aura::Window* window,
                                            aura::Window* transient) {
   FOR_EACH_OBSERVER(WmTransientWindowObserver, transient_observers_,
                     OnTransientChildRemoved(this, Get(transient)));
 }
 
 }  // namespace ash