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

components/sync_driver/data_type_manager.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_MANAGER_H__
 #define COMPONENTS_SYNC_DRIVER_DATA_TYPE_MANAGER_H__
 
 #include <list>
 #include <set>
 #include <string>
@@ skipping 27 matching lines @@
     ABORTED,             // Start was aborted by calling Stop() before
                          // all types were started.
     UNRECOVERABLE_ERROR  // We got an unrecoverable error during startup.
   };
 
   // Note: |errors| is only filled when status is not OK.
   struct ConfigureResult {
     ConfigureResult();
     ConfigureResult(ConfigureStatus status,
                     syncer::ModelTypeSet requested_types);
+    ConfigureResult(const ConfigureResult& other);
     ~ConfigureResult();
 
     ConfigureStatus status;
     syncer::ModelTypeSet requested_types;
     DataTypeStatusTable data_type_status_table;
   };
 
   virtual ~DataTypeManager() {}
 
   // Convert a ConfigureStatus to string for debug purposes.
@@ skipping 30 matching lines @@
   // stopped.
   virtual void Stop() = 0;
 
   // The current state of the data type manager.
   virtual State state() const = 0;
 };
 
 }  // namespace sync_driver
 
 #endif  // COMPONENTS_SYNC_DRIVER_DATA_TYPE_MANAGER_H__