In Windows desktop Chrome AURA the HandleVisibilityChanged function on the HWNDMessageHandlerDelega…

ui/views/win/hwnd_message_handler.cc

 // Copyright (c) 2012 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 "ui/views/win/hwnd_message_handler.h"
 
 #include <dwmapi.h>
 #include <shellapi.h>
 
 #include "base/bind.h"
@@ skipping 2085 matching lines @@
 }
 
 void HWNDMessageHandler::OnWindowPosChanged(WINDOWPOS* window_pos) {
   if (DidClientAreaSizeChange(window_pos))
     ClientAreaSizeChanged();
   if (remove_standard_frame_ && window_pos->flags & SWP_FRAMECHANGED &&
       ui::win::IsAeroGlassEnabled()) {
     MARGINS m = {10, 10, 10, 10};
     DwmExtendFrameIntoClientArea(hwnd(), &m);
   }
-  if (window_pos->flags & SWP_SHOWWINDOW)
-    delegate_->HandleVisibilityChanged(true);
   else if (window_pos->flags & SWP_HIDEWINDOW)
     delegate_->HandleVisibilityChanged(false);
   SetMsgHandled(FALSE);
 }
 
+void HWNDMessageHandler::OnShowWindow(BOOL visible, int lparam) {
+  if (visible)
+    delegate_->HandleVisibilityChanged(true);
+  SetMsgHandled(FALSE);
+}
+
 }  // namespace views