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

chrome/utility/media_galleries/ipc_data_source.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 "chrome/utility/media_galleries/ipc_data_source.h"
 
 #include "base/thread_task_runner_handle.h"
 #include "chrome/common/extensions/chrome_utility_extensions_messages.h"
 #include "content/public/utility/utility_thread.h"
 
@@ skipping 48 matching lines @@
                         OnRequestBlobBytesFinished)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;
 }
 
 IPCDataSource::Request::Request()
     : destination(NULL) {
 }
 
+IPCDataSource::Request::Request(const Request& other) = default;
+
 IPCDataSource::Request::~Request() {
 }
 
 void IPCDataSource::ReadOnUtilityThread(int64_t position,
                                         int size,
                                         uint8_t* data,
                                         const DataSource::ReadCB& read_cb) {
   DCHECK(utility_thread_checker_.CalledOnValidThread());
   CHECK_GE(total_size_, 0);
   CHECK_GE(position, 0);
@@ skipping 23 matching lines @@
   if (it == pending_requests_.end())
     return;
 
   std::copy(bytes.begin(), bytes.end(), it->second.destination);
   it->second.callback.Run(bytes.size());
 
   pending_requests_.erase(it);
 }
 
 }  // namespace metadata