[WIN] Remove "Pin this program to taskbar" of panel window.

ui/base/win/shell.h

 // Copyright (c) 2011 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_BASE_WIN_SHELL_H_
 #define UI_BASE_WIN_SHELL_H_
 
 #include <windows.h>
 
 #include "base/strings/string16.h"
@@ skipping 23 matching lines @@
 UI_EXPORT bool OpenAnyViaShell(const string16& full_path,
                                const string16& directory,
                                const string16& args,
                                DWORD mask);
 
 // Ask the user, via the Windows "Open With" dialog, for an application to use
 // to open the file specified by 'full_path'.
 // Returns 'true' on successful open, 'false' otherwise.
 bool OpenItemWithExternalApp(const string16& full_path);
 
+// Disables the ability of the specified window to be pinned to the taskbar or
+// the Start menu. This will remove "Pin this program to taskbar" from the
+// taskbar menu of the specified window.
+UI_EXPORT bool PreventWindowFromPinning(HWND hwnd);
+
 // Sets the application id given as the Application Model ID for the window
 // specified.  This method is used to insure that different web applications
 // do not group together on the Win7 task bar.
 UI_EXPORT void SetAppIdForWindow(const string16& app_id, HWND hwnd);
 
 // Sets the application icon for the window specified.
 UI_EXPORT void SetAppIconForWindow(const string16& app_icon, HWND hwnd);
 
 // Sets the relaunch command and relaunch display name for the window specified.
 // Windows will use this information for grouping on the taskbar, and to create
 // a shortcut if the window is pinned to the taskbar.
 UI_EXPORT void SetRelaunchDetailsForWindow(const string16& relaunch_command,
                                            const string16& display_name,
                                            HWND hwnd);
 
 // Returns true if composition is available and turned on on the current
 // platform.
 UI_EXPORT bool IsAeroGlassEnabled();
 
 }  // namespace win
 }  // namespace ui
 
 #endif  // UI_BASE_WIN_SHELL_H_