Use a struct instead of a union for SandboxInterfaceInfo...

sandbox/src/sandbox_types.h

Index: sandbox/src/sandbox_types.h
===================================================================
--- sandbox/src/sandbox_types.h	(revision 74231)
+++ sandbox/src/sandbox_types.h	(working copy)
@@ -1,4 +1,4 @@
-// Copyright (c) 2006-2009 The Chromium Authors. All rights reserved.
+// Copyright (c) 2006-2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
@@ -54,7 +54,7 @@
 class BrokerServices;
 
 // Contains the pointer to a target or broker service.
-union SandboxInterfaceInfo {
+struct SandboxInterfaceInfo {
   TargetServices* target_services;
   BrokerServices* broker_services;
 };