Fix crash due to parsing of raw branch code from Google Update

chrome/installer/util/google_update_constants.h

 // Copyright (c) 2006-2008 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 the command-line switches used with Google Update.
 
 #ifndef CHROME_INSTALLER_UTIL_GOOGLE_UPDATE_CONSTANTS_H_
 #define CHROME_INSTALLER_UTIL_GOOGLE_UPDATE_CONSTANTS_H_
 
 namespace google_update {
 
 // Strictly speaking Google Update doesn't care about this GUID but it is still
 // related to install as it is used by MSI to identify Gears.
 extern const wchar_t kGearsUpgradeCode[];
 
+// The GUID Google Update uses to keep track of Chrome upgrades.
+extern const wchar_t kChromeUpgradeCode[];
+
 extern const wchar_t kRegPathClients[];
 
 // The difference between ClientState and ClientStateMedium is that the former
 // lives on HKCU or HKLM and the later always lives in HKLM. The only use of
 // the ClientStateMedium is for the EULA consent. See bug 1594565.
 extern const wchar_t kRegPathClientState[];
 extern const wchar_t kRegPathClientStateMedium[];
 
 extern const wchar_t kRegApField[];
 extern const wchar_t kRegBrowserField[];
 extern const wchar_t kRegClientField[];
 extern const wchar_t kRegDidRunField[];
 extern const wchar_t kRegLangField[];
 extern const wchar_t kRegLastCheckedField[];
 extern const wchar_t kRegMetricsId[];
 extern const wchar_t kRegNameField[];
 extern const wchar_t kRegOldVersionField[];
 extern const wchar_t kRegRenameCmdField[];
 extern const wchar_t kRegRLZBrandField[];
 extern const wchar_t kRegUsageStatsField[];
 extern const wchar_t kRegVersionField[];
 extern const wchar_t kRegReferralField[];
 extern const wchar_t kRegEULAAceptedField[];
 
 extern const wchar_t kEnvProductVersionKey[];
 }  // namespace google_update
 
 #endif  // CHROME_INSTALLER_UTIL_GOOGLE_UPDATE_CONSTANTS_H_