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

components/sync_driver/data_type_status_table.h

 // 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.
 
 #ifndef COMPONENTS_SYNC_DRIVER_DATA_TYPE_STATUS_TABLE_H_
 #define COMPONENTS_SYNC_DRIVER_DATA_TYPE_STATUS_TABLE_H_
 
 #include <map>
 #include <string>
 
 #include "components/sync_driver/data_type_manager.h"
 
 namespace sync_driver {
 
 // Class to keep track of data types that have encountered an error during sync.
 class DataTypeStatusTable {
  public:
   typedef std::map<syncer::ModelType, syncer::SyncError> TypeErrorMap;
 
   DataTypeStatusTable();
+  DataTypeStatusTable(const DataTypeStatusTable& other);
   ~DataTypeStatusTable();
 
   // Copy and assign welcome.
 
   // Update the failed datatypes. Types will be added to their corresponding
   // error map based on their |error_type()|.
   void UpdateFailedDataTypes(const TypeErrorMap& errors);
 
   // Resets the current set of data type errors.
   void Reset();
@@ skipping 57 matching lines @@
   TypeErrorMap persistence_errors_;
 
   // List of data types that could not start due to not being ready. These can
   // be marked as ready by calling ResetUnreadyErrorFor(..).
   TypeErrorMap unready_errors_;
 };
 
 }  // namespace sync_driver
 
 #endif  // COMPONENTS_SYNC_DRIVER_DATA_TYPE_STATUS_TABLE_H_