Don't check autohide taskbar for WS_EX_TOPMOST when we are querying the autohide state.

ui/views/win/hwnd_message_handler.h

 // 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.
 
 #ifndef UI_VIEWS_WIN_HWND_MESSAGE_HANDLER_H_
 #define UI_VIEWS_WIN_HWND_MESSAGE_HANDLER_H_
 
 #include <windows.h>
 
 #include <stddef.h>
@@ skipping 45 matching lines @@
 // So we need to handle these messages in CustomFrameWindow to prevent this
 // from happening.
 const int WM_NCUAHDRAWCAPTION = 0xAE;
 const int WM_NCUAHDRAWFRAME = 0xAF;
 
 // The HWNDMessageHandler sends this message to itself on
 // WM_WINDOWPOSCHANGING. It's used to inform the client if a
 // WM_WINDOWPOSCHANGED won't be received.
 const int WM_WINDOWSIZINGFINISHED = WM_USER;
 
+// Message used by the shell to send us notification messages related to the
+// taskbar.
+const int WM_APPBAR_NOTIFICATION_MESSAGE = WM_APP + 1;
+
 // IsMsgHandled() and BEGIN_SAFE_MSG_MAP_EX are a modified version of
 // BEGIN_MSG_MAP_EX. The main difference is it uses a WeakPtrFactory member
 // (|weak_factory|) that is used in _ProcessWindowMessage() and changing
 // IsMsgHandled() from a member function to a define that checks if the weak
 // factory is still valid in addition to the member. Together these allow for
 // |this| to be deleted during dispatch.
 #define IsMsgHandled() !ref.get() || msg_handled_
 
 #define BEGIN_SAFE_MSG_MAP_EX(weak_factory) \
  private: \
@@ skipping 341 matching lines @@
     CR_MSG_WM_PAINT(OnPaint)
     CR_MSG_WM_SETFOCUS(OnSetFocus)
     CR_MSG_WM_SETICON(OnSetIcon)
     CR_MSG_WM_SETTEXT(OnSetText)
     CR_MSG_WM_SETTINGCHANGE(OnSettingChange)
     CR_MSG_WM_SIZE(OnSize)
     CR_MSG_WM_SYSCOMMAND(OnSysCommand)
     CR_MSG_WM_THEMECHANGED(OnThemeChanged)
     CR_MSG_WM_WINDOWPOSCHANGED(OnWindowPosChanged)
     CR_MSG_WM_WINDOWPOSCHANGING(OnWindowPosChanging)
+    CR_MESSAGE_HANDLER_EX(WM_APPBAR_NOTIFICATION_MESSAGE, OnAppBarMessage)
   CR_END_MSG_MAP()
 
   // Message Handlers.
   // This list is in _ALPHABETICAL_ order!
   // TODO(beng): Once this object becomes the WindowImpl, these methods can
   //             be made private.
   void OnActivateApp(BOOL active, DWORD thread_id);
   // TODO(beng): return BOOL is temporary until this object becomes a
   //             WindowImpl.
   BOOL OnAppCommand(HWND window, short command, WORD device, int keystate);
@@ skipping 38 matching lines @@
   LRESULT OnSetIcon(UINT size_type, HICON new_icon);
   LRESULT OnSetText(const wchar_t* text);
   void OnSettingChange(UINT flags, const wchar_t* section);
   void OnSize(UINT param, const gfx::Size& size);
   void OnSysCommand(UINT notification_code, const gfx::Point& point);
   void OnThemeChanged();
   LRESULT OnTouchEvent(UINT message, WPARAM w_param, LPARAM l_param);
   void OnWindowPosChanging(WINDOWPOS* window_pos);
   void OnWindowPosChanged(WINDOWPOS* window_pos);
   LRESULT OnWindowSizingFinished(UINT message, WPARAM w_param, LPARAM l_param);
+  LRESULT OnAppBarMessage(UINT message, WPARAM w_param, LPARAM l_param);
 
   // Receives Windows Session Change notifications.
   void OnSessionChange(WPARAM status_code);
 
   typedef std::vector<ui::TouchEvent> TouchEvents;
   // Helper to handle the list of touch events passed in. We need this because
   // touch events on windows don't fire if we enter a modal loop in the context
   // of a touch event.
   void HandleTouchEvents(const TouchEvents& touch_events);
 
@@ skipping 205 matching lines @@
 
   // The factory used with BEGIN_SAFE_MSG_MAP_EX.
   base::WeakPtrFactory<HWNDMessageHandler> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(HWNDMessageHandler);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIN_HWND_MESSAGE_HANDLER_H_