chrome: Cleanup class/struct forward declarations

chrome/installer/setup/setup_util.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.
 //
 // This file declares util functions for setup project. It also declares a
 // few functions that the Chrome component updater uses for patching binary
 // deltas.
 
 #ifndef CHROME_INSTALLER_SETUP_SETUP_UTIL_H_
 #define CHROME_INSTALLER_SETUP_SETUP_UTIL_H_
@@ skipping 15 matching lines @@
 namespace base {
 class CommandLine;
 class FilePath;
 class Version;
 }
 
 namespace installer {
 
 class InstallationState;
 class InstallerState;
-class ProductState;
 class MasterPreferences;
 
 extern const char kUnPackStatusMetricsName[];
 extern const char kUnPackNTSTATUSMetricsName[];
 
 // The name of consumers of UnPackArchive which is used to publish metrics.
 enum UnPackConsumer {
   CHROME_ARCHIVE_PATCH,
   COMPRESSED_CHROME_ARCHIVE,
   SETUP_EXE_PATCH,
@@ skipping 122 matching lines @@
   // The previous state of the privilege this object is responsible for. As set
   // by AdjustTokenPrivileges() upon construction.
   TOKEN_PRIVILEGES previous_privileges_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(ScopedTokenPrivilege);
 };
 
 }  // namespace installer
 
 #endif  // CHROME_INSTALLER_SETUP_SETUP_UTIL_H_