Add more out of line copy ctors for complex classes.

ipc/ipc_message_utils.cc

 // 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.
 
 #include "ipc/ipc_message_utils.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include "base/files/file_path.h"
@@ skipping 312 matching lines @@
 // -----------------------------------------------------------------------------
 
 LogData::LogData()
     : routing_id(0),
       type(0),
       sent(0),
       receive(0),
       dispatch(0) {
 }
 
+LogData::LogData(const LogData& other) = default;
+
 LogData::~LogData() {
 }
 
 void ParamTraits<bool>::Log(const param_type& p, std::string* l) {
   l->append(p ? "true" : "false");
 }
 
 void ParamTraits<signed char>::GetSize(base::PickleSizer* sizer,
                                        const param_type& p) {
   sizer->AddBytes(sizeof(param_type));
@@ skipping 873 matching lines @@
   return result;
 }
 
 void ParamTraits<MSG>::Log(const param_type& p, std::string* l) {
   l->append("<MSG>");
 }
 
 #endif  // OS_WIN
 
 }  // namespace IPC