Revert of Add enable_ipc_logging build argument

content/public/common/content_ipc_logging.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.
 
 #ifndef CONTENT_PUBLIC_COMMON_CONTENT_IPC_LOGGING_H_
 #define CONTENT_PUBLIC_COMMON_CONTENT_IPC_LOGGING_H_
 
+#include "ipc/ipc_message.h"  // For IPC_MESSAGE_LOG_ENABLED.
+
 #include <stdint.h>
 
 #include "content/common/content_export.h"
 #include "ipc/ipc_logging.h"
 
 namespace content {
 
-#if BUILDFLAG(IPC_MESSAGE_LOG_ENABLED)
+#if defined(IPC_MESSAGE_LOG_ENABLED)
 
 // Register a logger for the given IPC message. Use
 //
 //   #define IPC_MESSAGE_MACROS_LOG_ENABLED
 //   #define IPC_LOG_TABLE_ADD_ENTRY(msg_id, logger)
 //       content::RegisterIPCLogger(msg_id, logger)
 //
 // to register IPC messages with the logging system.
 CONTENT_EXPORT void RegisterIPCLogger(uint32_t msg_id, LogFunction logger);
 
 #endif
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_COMMON_CONTENT_IPC_LOGGING_H_