Give SxS distribution its own registration GUIDs.

chrome/installer/util/chrome_app_host_distribution.cc

Index: chrome/installer/util/chrome_app_host_distribution.cc
diff --git a/chrome/installer/util/chrome_app_host_distribution.cc b/chrome/installer/util/chrome_app_host_distribution.cc
index 1c4c0e13fcd0b119e3c52c65e31bbe65c7b2991c..bd8509a0e257e4aa78076c223205eefaa71dde27 100644
--- a/chrome/installer/util/chrome_app_host_distribution.cc
+++ b/chrome/installer/util/chrome_app_host_distribution.cc
@@ -120,6 +120,10 @@ string16 ChromeAppHostDistribution::GetVersionKey() {
   return key;
 }
 
+bool ChromeAppHostDistribution::IsSetAsDefaultSupported() {
+  return false;
+}
+
 bool ChromeAppHostDistribution::CanSetAsDefault() {
   return false;
 }
@@ -132,11 +136,16 @@ string16 ChromeAppHostDistribution::GetIconFilename() {
   return installer::kChromeAppHostExe;
 }
 
-bool ChromeAppHostDistribution::GetCommandExecuteImplClsid(
+bool ChromeAppHostDistribution::GetCommandExecuteImplClsidString(
     string16* handler_class_uuid) {
   return false;
 }
 
+bool ChromeAppHostDistribution::GetCommandExecuteImplClsid(
+    CLSID* handler_class_uuid) {
+  return false;
+}
+
 void ChromeAppHostDistribution::UpdateInstallStatus(bool system_install,
     installer::ArchiveType archive_type,
     installer::InstallStatus install_status) {