Add options to write version number to registry.

chrome/installer/setup/setup_util.h

Index: chrome/installer/setup/setup_util.h
diff --git a/chrome/installer/setup/setup_util.h b/chrome/installer/setup/setup_util.h
index 38ffc0664c4aca0bf6fc9ea842312f4919d716dc..b57def88634000aaf0c4644e8ddca4179d309eb2 100644
--- a/chrome/installer/setup/setup_util.h
+++ b/chrome/installer/setup/setup_util.h
@@ -134,6 +134,10 @@ void DeleteRegistryKeyPartial(
     const base::string16& path,
     const std::vector<base::string16>& keys_to_preserve);
 
+// Converts a product GUID into a SQuished gUID that is used for MSI installer
+// registry entries.
+std::string GuidToSquid(const std::string& guid);
+
 // This class will enable the privilege defined by |privilege_name| on the
 // current process' token. The privilege will be disabled upon the
 // ScopedTokenPrivilege's destruction (unless it was already enabled when the