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

chrome/common/importer/importer_data_types.cc

 // Copyright 2013 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 "build/build_config.h"
 #include "chrome/common/importer/importer_data_types.h"
 
 namespace importer {
 
 SourceProfile::SourceProfile()
     : importer_type(TYPE_UNKNOWN),
       services_supported(0) {
 }
 
+SourceProfile::SourceProfile(const SourceProfile& other) = default;
+
 SourceProfile::~SourceProfile() {
 }
 
 #if defined(OS_WIN)
 ImporterIE7PasswordInfo::ImporterIE7PasswordInfo() {
 }
 
 ImporterIE7PasswordInfo::~ImporterIE7PasswordInfo() {
 }
 #endif
 
 }  // namespace importer