components: Add out-of-line copy ctors for complex classes.

components/sync_driver/data_type_status_table.cc

 // Copyright 2014 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 "components/sync_driver/data_type_manager.h"
 #include "components/sync_driver/data_type_status_table.h"
 
 namespace sync_driver {
 
 namespace {
 
 syncer::ModelTypeSet GetTypesFromErrorMap(
     const DataTypeStatusTable::TypeErrorMap& errors) {
   syncer::ModelTypeSet result;
   for (DataTypeStatusTable::TypeErrorMap::const_iterator it = errors.begin();
        it != errors.end(); ++it) {
     DCHECK(!result.Has(it->first));
     result.Put(it->first);
   }
   return result;
 }
 
 }  // namespace
 
 DataTypeStatusTable::DataTypeStatusTable() {
 }
 
+DataTypeStatusTable::DataTypeStatusTable(const DataTypeStatusTable& other) =
+    default;
+
 DataTypeStatusTable::~DataTypeStatusTable() {
 }
 
 void DataTypeStatusTable::UpdateFailedDataTypes(const TypeErrorMap& errors) {
   DVLOG(1) << "Setting " << errors.size() << " new failed types.";
 
   for (TypeErrorMap::const_iterator iter = errors.begin(); iter != errors.end();
        ++iter) {
     syncer::SyncError::ErrorType failure_type = iter->second.error_type();
     switch (failure_type) {
@@ skipping 99 matching lines @@
 syncer::SyncError DataTypeStatusTable::GetUnrecoverableError() const {
   // Just return the first one. It is assumed all the unrecoverable errors
   // have the same cause. The others are just tracked to know which types
   // were involved.
   return (unrecoverable_errors_.empty()
               ? syncer::SyncError()
               : unrecoverable_errors_.begin()->second);
 }
 
 }  // namespace sync_driver