Add -multifail to the Google Update "ap" value if --multi-install is present ...

chrome/installer/mini_installer/mini_installer.h

Index: chrome/installer/mini_installer/mini_installer.h
===================================================================
--- chrome/installer/mini_installer/mini_installer.h	(revision 70612)
+++ chrome/installer/mini_installer/mini_installer.h	(working copy)
@@ -28,6 +28,9 @@
 // Google Update will use the full installer if this suffix is found in the ap
 // value.
 const wchar_t kFullInstallerSuffix[] = L"-full";
+// Google Update will use the single-install configuration if this suffix is
+// found in the ap value.
+const wchar_t kMultifailInstallerSuffix[] = L"-multifail";
 // ap value tag for a multi-install product.
 const wchar_t kMultiInstallTag[] = L"-multi";