Make GetCommandExecuteImplClsid return the CLSID as a string directly.

chrome/installer/util/chromium_binaries_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 declares a class that contains various method related to branding.
 
 #include "chrome/installer/util/google_chrome_binaries_distribution.h"
 
 #include "base/logging.h"
 #include "chrome/installer/util/app_registration_data.h"
@@ skipping 88 matching lines @@
 int ChromiumBinariesDistribution::GetIconIndex(ShortcutType shortcut_type) {
   NOTREACHED();
   return 0;
 }
 
 bool ChromiumBinariesDistribution::GetChromeChannel(base::string16* channel) {
   NOTREACHED();
   return false;
 }
 
-bool ChromiumBinariesDistribution::GetCommandExecuteImplClsid(
-    base::string16* handler_class_uuid) {
-  return false;
+base::string16 ChromiumBinariesDistribution::GetCommandExecuteImplClsid() {
+  return base::string16();
 }