Refactoring installer shortcut deletion; adding dedicated shortcut update feature.

base/base_paths_win.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 <windows.h>
 #include <shlobj.h>
 
 #include "base/base_paths.h"
 #include "base/file_util.h"
@@ skipping 177 matching lines @@
       break;
     case base::DIR_USER_QUICK_LAUNCH:
       if (!GetQuickLaunchPath(false, &cur))
         return false;
       break;
     case base::DIR_DEFAULT_USER_QUICK_LAUNCH:
       if (!GetQuickLaunchPath(true, &cur))
         return false;
       break;
     case base::DIR_TASKBAR_PINS:
+      if (win::GetVersion() < win::VERSION_WIN7)
+        return false;
+
       if (!PathService::Get(base::DIR_USER_QUICK_LAUNCH, &cur))
         return false;
       cur = cur.AppendASCII("User Pinned");
       cur = cur.AppendASCII("TaskBar");
       break;
     default:
       return false;
   }
 
   *result = cur;
   return true;
 }
 
 }  // namespace base