Return a new error code for multi-install updates if Group Policy settings blocking...

chrome/installer/util/util_constants.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.
 //
 // Defines all install related constants that need to be used by Chrome as
 // well as Chrome Installer.
 
 #ifndef CHROME_INSTALLER_UTIL_UTIL_CONSTANTS_H_
 #define CHROME_INSTALLER_UTIL_UTIL_CONSTANTS_H_
 #pragma once
@@ skipping 56 matching lines @@
   READY_MODE_TEMP_OPT_OUT_FAILED,   // 37. Failed to temporarily opt-out of
                                     // Chrome Frame.
   READY_MODE_END_TEMP_OPT_OUT_FAILED,   // 38. Failed to end temporary opt-out
                                         // of Chrome Frame.
   CONFLICTING_CHANNEL_EXISTS,  // 39. A multi-install product on a different
                                // update channel exists.
   READY_MODE_REQUIRES_CHROME,  // 40. Chrome Frame in ready-mode requires Chrome
   REQUIRES_MULTI_INSTALL,      // 41. --multi-install was missing from the
                                // command line.
   APPLY_DIFF_PATCH_FAILED,     // 42. Failed to apply a diff patch.
+  INCONSISTENT_UPDATE_POLICY,  // 43. Inconsistent update policy GP settings.
 };
 
 
 // If the following compile assert fires it means that the InstallStatus
 // enumeration changed which will break the contract between the old
 // chrome installed and the new setup.exe that is trying to upgrade.
-COMPILE_ASSERT(installer::CONFLICTING_CHANNEL_EXISTS == 39,
+COMPILE_ASSERT(installer::INCONSISTENT_UPDATE_POLICY == 43,
                dont_change_enum);
 
 // The type of an update archive.
 enum ArchiveType {
   UNKNOWN_ARCHIVE_TYPE,     // Unknown or uninitialized.
   FULL_ARCHIVE_TYPE,        // Full chrome.7z archive.
   INCREMENTAL_ARCHIVE_TYPE  // Incremental or differential archive.
 };
 
 // Stages of an installation reported through Google Update on failure.
@@ skipping 99 matching lines @@
 extern const wchar_t kInstallerResultUIString[];
 extern const wchar_t kInstallerSuccessLaunchCmdLine[];
 
 // Product options.
 extern const wchar_t kOptionMultiInstall[];
 extern const wchar_t kOptionReadyMode[];
 
 }  // namespace installer
 
 #endif  // CHROME_INSTALLER_UTIL_UTIL_CONSTANTS_H_