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

chrome/browser/media_galleries/fileapi/mtp_device_async_delegate.h

 // Copyright (c) 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.
 
 #ifndef CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_MTP_DEVICE_ASYNC_DELEGATE_H_
 #define CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_MTP_DEVICE_ASYNC_DELEGATE_H_
 
 #include <stdint.h>
 
 #include "base/callback.h"
@@ skipping 44 matching lines @@
       void(const base::File::Info& file_info,
            int bytes_read)> ReadBytesSuccessCallback;
 
   struct ReadBytesRequest {
     ReadBytesRequest(uint32_t file_id,
                      net::IOBuffer* buf,
                      int64_t offset,
                      int buf_len,
                      const ReadBytesSuccessCallback& success_callback,
                      const ErrorCallback& error_callback);
+    ReadBytesRequest(const ReadBytesRequest& other);
     ~ReadBytesRequest();
 
     uint32_t file_id;
     scoped_refptr<net::IOBuffer> buf;
     int64_t offset;
     int buf_len;
     ReadBytesSuccessCallback success_callback;
     ErrorCallback error_callback;
   };
 
@@ skipping 140 matching lines @@
 
 typedef base::Callback<void(MTPDeviceAsyncDelegate*)>
     CreateMTPDeviceAsyncDelegateCallback;
 
 void CreateMTPDeviceAsyncDelegate(
     const base::FilePath::StringType& device_location,
     const bool read_only,
     const CreateMTPDeviceAsyncDelegateCallback& callback);
 
 #endif  // CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_MTP_DEVICE_ASYNC_DELEGATE_H_