Retrieve client_id from GoogleUpdateSettings when its missing from Local State.

chrome/installer/util/google_update_constants.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 "chrome/installer/util/google_update_constants.h"
 
 namespace google_update {
 
 const wchar_t kChromeUpgradeCode[] = L"{8A69D345-D564-463C-AFF1-A69D9E530F96}";
 
@@ skipping 27 matching lines @@
 const wchar_t kRegGoogleUpdateVersion[] = L"version";
 const wchar_t kRegLangField[] = L"lang";
 const wchar_t kRegLastStartedAUField[] = L"LastStartedAU";
 const wchar_t kRegLastCheckedField[] = L"LastChecked";
 const wchar_t kRegLastCheckSuccessField[] = L"LastCheckSuccess";
 const wchar_t kRegLastInstallerResultField[] = L"LastInstallerResult";
 const wchar_t kRegLastInstallerErrorField[] = L"LastInstallerError";
 const wchar_t kRegLastInstallerExtraField[] = L"LastInstallerExtraCode1";
 const wchar_t kRegLastRunTimeField[] = L"lastrun";
 const wchar_t kRegMetricsId[] = L"metricsid";
+const wchar_t kRegMetricsIdEnabledDate[] = L"metricsid_enableddate";
+const wchar_t kRegMetricsIdInstallDate[] = L"metricsid_installdate";
 const wchar_t kRegMSIField[] = L"msi";
 const wchar_t kRegNameField[] = L"name";
 const wchar_t kRegOemInstallField[] = L"oeminstall";
 const wchar_t kRegOldVersionField[] = L"opv";
 const wchar_t kRegOopcrashesField[] = L"oopcrashes";
 const wchar_t kRegPathField[] = L"path";
 const wchar_t kRegProfilesActive[] = L"_NumAccounts";
 const wchar_t kRegProfilesSignedIn[] = L"_NumSignedIn";
 const wchar_t kRegRLZBrandField[] = L"brand";
 const wchar_t kRegRLZReactivationBrandField[] = L"reactivationbrand";
 const wchar_t kRegReferralField[] = L"referral";
 const wchar_t kRegRenameCmdField[] = L"cmd";
 const wchar_t kRegRunAsUserField[] = L"RunAsUser";
 const wchar_t kRegSendsPingsField[] = L"SendsPings";
 const wchar_t kRegUninstallCmdLine[] = L"UninstallCmdLine";
 const wchar_t kRegUsageStatsField[] = L"usagestats";
 const wchar_t kRegVersionField[] = L"pv";
 const wchar_t kRegWebAccessibleField[] = L"WebAccessible";
 
 }  // namespace google_update