Make GetCommandExecuteImplClsid return the CLSID as a string directly.

chrome/installer/util/chrome_frame_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 a specific implementation of BrowserDistribution class for
 // Chrome Frame. It overrides the bare minimum of methods necessary to get a
 // Chrome Frame installer that does not interact with Google Chrome or
 // Chromium installations.
 
 #include "chrome/installer/util/chrome_frame_distribution.h"
@@ skipping 90 matching lines @@
 
 BrowserDistribution::DefaultBrowserControlPolicy
     ChromeFrameDistribution::GetDefaultBrowserControlPolicy() {
   return DEFAULT_BROWSER_UNSUPPORTED;
 }
 
 bool ChromeFrameDistribution::CanCreateDesktopShortcuts() {
   return false;
 }
 
-bool ChromeFrameDistribution::GetCommandExecuteImplClsid(
-    base::string16* handler_class_uuid) {
-  return false;
+base::string16 ChromeFrameDistribution::GetCommandExecuteImplClsid() {
+  return base::string16();
 }
 
 void ChromeFrameDistribution::UpdateInstallStatus(bool system_install,
     installer::ArchiveType archive_type,
     installer::InstallStatus install_status) {
 #if defined(GOOGLE_CHROME_BUILD)
   GoogleUpdateSettings::UpdateInstallStatus(system_install,
       archive_type, InstallUtil::GetInstallReturnCode(install_status),
       kChromeFrameGuid);
 #endif
 }