Make GetCommandExecuteImplClsid return the CLSID as a string directly.

chrome/installer/util/google_chrome_sxs_distribution.cc

Index: chrome/installer/util/google_chrome_sxs_distribution.cc
diff --git a/chrome/installer/util/google_chrome_sxs_distribution.cc b/chrome/installer/util/google_chrome_sxs_distribution.cc
index a6b23a8744e873a9bb5efcc30689a2e88514dfde..57914f34b61899688978ae14b4a4525a58856c20 100644
--- a/chrome/installer/util/google_chrome_sxs_distribution.cc
+++ b/chrome/installer/util/google_chrome_sxs_distribution.cc
@@ -102,11 +102,8 @@ bool GoogleChromeSxSDistribution::GetChromeChannel(base::string16* channel) {
   return true;
 }
 
-bool GoogleChromeSxSDistribution::GetCommandExecuteImplClsid(
-    base::string16* handler_class_uuid) {
-  if (handler_class_uuid)
-    *handler_class_uuid = kCommandExecuteImplUuid;
-  return true;
+base::string16 GoogleChromeSxSDistribution::GetCommandExecuteImplClsid() {
+  return kCommandExecuteImplUuid;
 }
 
 bool GoogleChromeSxSDistribution::ShouldSetExperimentLabels() {