Revert "Fix a ton of compiler warnings."

ipc/ipc_sync_message.h

-// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Copyright (c) 2006-2008 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.
 
-#ifndef IPC_IPC_SYNC_MESSAGE_H_
-#define IPC_IPC_SYNC_MESSAGE_H_
+#ifndef IPC_IPC_SYNC_MESSAGE_H__
+#define IPC_IPC_SYNC_MESSAGE_H__
 
 #if defined(OS_WIN)
 #include <windows.h>
 #endif
 #include <string>
 #include "base/basictypes.h"
 #include "ipc/ipc_message.h"
 
 namespace base {
 class WaitableEvent;
@@ skipping 60 matching lines @@
 
   MessageReplyDeserializer* deserializer_;
   base::WaitableEvent* pump_messages_event_;
 
   static uint32 next_id_;  // for generation of unique ids
 };
 
 // Used to deserialize parameters from a reply to a synchronous message
 class MessageReplyDeserializer {
  public:
-  virtual ~MessageReplyDeserializer() {}
   bool SerializeOutputParameters(const Message& msg);
  private:
   // Derived classes need to implement this, using the given iterator (which
   // is skipped past the header for synchronous messages).
   virtual bool SerializeOutputParameters(const Message& msg, void* iter) = 0;
 };
 
 }  // namespace IPC
 
-#endif  // IPC_IPC_SYNC_MESSAGE_H_
+#endif  // IPC_IPC_SYNC_MESSAGE_H__