Make GetCommandExecuteImplClsid return the CLSID as a string directly.

chrome/installer/util/google_chrome_distribution.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.
 //
 // This file defines specific implementation of BrowserDistribution class for
 // Google Chrome.
 
 #include "chrome/installer/util/google_chrome_distribution.h"
 
 #include <windows.h>
@@ skipping 218 matching lines @@
 
 base::string16 GoogleChromeDistribution::GetUninstallRegPath() {
   return L"Software\\Microsoft\\Windows\\CurrentVersion\\Uninstall\\"
          L"Google Chrome";
 }
 
 base::string16 GoogleChromeDistribution::GetIconFilename() {
   return installer::kChromeExe;
 }
 
-bool GoogleChromeDistribution::GetCommandExecuteImplClsid(
-    base::string16* handler_class_uuid) {
-  if (handler_class_uuid)
-    *handler_class_uuid = kCommandExecuteImplUuid;
-  return true;
+base::string16 GoogleChromeDistribution::GetCommandExecuteImplClsid() {
+  return kCommandExecuteImplUuid;
 }
 
 // This method checks if we need to change "ap" key in Google Update to try
 // full installer as fall back method in case incremental installer fails.
 // - If incremental installer fails we append a magic string ("-full"), if
 // it is not present already, so that Google Update server next time will send
 // full installer to update Chrome on the local machine
 // - If we are currently running full installer, we remove this magic
 // string (if it is present) regardless of whether installer failed or not.
 // There is no fall-back for full installer :)
 void GoogleChromeDistribution::UpdateInstallStatus(bool system_install,
     installer::ArchiveType archive_type,
     installer::InstallStatus install_status) {
   GoogleUpdateSettings::UpdateInstallStatus(system_install,
       archive_type, InstallUtil::GetInstallReturnCode(install_status),
       GetAppGuid());
 }
 
 bool GoogleChromeDistribution::ShouldSetExperimentLabels() {
   return true;
 }
 
 bool GoogleChromeDistribution::HasUserExperiments() {
   return true;
 }