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

components/proximity_auth/ble/bluetooth_low_energy_connection.cc

 // Copyright 2015 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 "components/proximity_auth/ble/bluetooth_low_energy_connection.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/location.h"
@@ skipping 300 matching lines @@
   }
 }
 
 BluetoothLowEnergyConnection::WriteRequest::WriteRequest(
     const std::vector<uint8_t>& val,
     bool flag)
     : value(val),
       is_last_write_for_wire_message(flag),
       number_of_failed_attempts(0) {}
 
+BluetoothLowEnergyConnection::WriteRequest::WriteRequest(
+    const WriteRequest& other) = default;
+
 BluetoothLowEnergyConnection::WriteRequest::~WriteRequest() {}
 
 void BluetoothLowEnergyConnection::CompleteConnection() {
   PA_LOG(INFO) << "Connection completed. Time elapsed: "
                << base::TimeTicks::Now() - start_time_;
   SetSubStatus(SubStatus::CONNECTED);
 }
 
 void BluetoothLowEnergyConnection::OnCreateGattConnectionError(
     device::BluetoothDevice::ConnectErrorCode error_code) {
@@ skipping 275 matching lines @@
     const uint32_t value) {
   std::vector<uint8_t> bytes(4, 0);
   bytes[0] = static_cast<uint8_t>(value);
   bytes[1] = static_cast<uint8_t>(value >> 8);
   bytes[2] = static_cast<uint8_t>(value >> 16);
   bytes[3] = static_cast<uint8_t>(value >> 24);
   return bytes;
 }
 
 }  // namespace proximity_auth