Revert of Add best-effort/allow rollback flags on WorkItem.

chrome/installer/util/install_util.h

Index: chrome/installer/util/install_util.h
diff --git a/chrome/installer/util/install_util.h b/chrome/installer/util/install_util.h
index da7b379857716a5d0f44cebfb991a3f2149707bf..79b8e2a2304f8755ce5a038b18da275ec1ddd017 100644
--- a/chrome/installer/util/install_util.h
+++ b/chrome/installer/util/install_util.h
@@ -72,9 +72,9 @@
   // This function checks if the current OS is supported for Chromium.
   static bool IsOSSupported();
 
-  // Adds work items to |install_list| to set installer error information in the
-  // registry for consumption by Google Update. |install_list| must be best-
-  // effort with rollback disabled. |state_key| must be the full path to an
+  // Adds work items to |install_list|, which should be a
+  // NoRollbackWorkItemList, to set installer error information in the registry
+  // for consumption by Google Update.  |state_key| must be the full path to an
   // app's ClientState key.  See InstallerState::WriteInstallerResult for more
   // details.
   static void AddInstallerResultItems(bool system_install,