Only do DelegateExecute verb handler registration for Google Chrome.

chrome/installer/util/google_chrome_distribution_dummy.cc

Index: chrome/installer/util/google_chrome_distribution_dummy.cc
diff --git a/chrome/installer/util/google_chrome_distribution_dummy.cc b/chrome/installer/util/google_chrome_distribution_dummy.cc
index 592e2f24646a1d9414baf90fdb64de4cb884ddba..d3e8ff282e29d0584a095c18f5ecc193c5773434 100644
--- a/chrome/installer/util/google_chrome_distribution_dummy.cc
+++ b/chrome/installer/util/google_chrome_distribution_dummy.cc
@@ -111,6 +111,16 @@ std::wstring GoogleChromeDistribution::GetVersionKey() {
   return std::wstring();
 }
 
+bool GoogleChromeDistribution::GetDelegateExecuteHandlerData(
+    string16* handler_class_uuid,
+    string16* type_lib_uuid,
+    string16* type_lib_version,
+    string16* interface_uuid) {
+  NOTREACHED();
+  return false;
+}
+
+
 void GoogleChromeDistribution::UpdateInstallStatus(bool system_install,
     installer::ArchiveType archive_type,
     installer::InstallStatus install_status) {