Remove #pragma once from jingle

jingle/notifier/base/weak_xmpp_client.h

 // Copyright (c) 2012 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.
 //
 // A thin wrapper around buzz::XmppClient that exposes weak pointers
 // so that users know when the buzz::XmppClient becomes invalid to use
 // (not necessarily only at destruction time).
 
 #ifndef JINGLE_NOTIFIER_BASE_WEAK_XMPP_CLIENT_H_
 #define JINGLE_NOTIFIER_BASE_WEAK_XMPP_CLIENT_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/weak_ptr.h"
 #include "base/threading/non_thread_safe.h"
 #include "talk/xmpp/xmppclient.h"
 
 namespace talk_base {
 class TaskParent;
 }  // namespace
@@ skipping 26 matching lines @@
   // SupportsWeakPtr since we want to invalidate in other places
   // besides the destructor.
   base::WeakPtrFactory<WeakXmppClient> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(WeakXmppClient);
 };
 
 }  // namespace notifier
 
 #endif  // JINGLE_NOTIFIER_BASE_WEAK_XMPP_CLIENT_H_