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

components/proximity_auth/ble/bluetooth_low_energy_connection.h

 // 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.
 
 #ifndef COMPONENTS_PROXIMITY_AUTH_BLE_BLUETOOTH_LOW_ENERGY_CONNECTION_H_
 #define COMPONENTS_PROXIMITY_AUTH_BLE_BLUETOOTH_LOW_ENERGY_CONNECTION_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 120 matching lines @@
 
  private:
   // Represents a request to write |value| to a some characteristic.
   // |is_last_write_for_wire_messsage| indicates whether this request
   // corresponds to the last write request for some wire message.
   // A WireMessage corresponds to exactly two WriteRequest: the first containing
   // a kSendSignal + the size of the WireMessage, and the second containing a
   // SendStatusSignal + the serialized WireMessage.
   struct WriteRequest {
     WriteRequest(const std::vector<uint8_t>& val, bool flag);
+    WriteRequest(const WriteRequest& other);
     ~WriteRequest();
 
     std::vector<uint8_t> value;
     bool is_last_write_for_wire_message;
     int number_of_failed_attempts;
   };
 
   // Creates the GATT connection with |remote_device|.
   void CreateGattConnection();
 
@@ skipping 152 matching lines @@
   base::TimeTicks start_time_;
 
   base::WeakPtrFactory<BluetoothLowEnergyConnection> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BluetoothLowEnergyConnection);
 };
 
 }  // namespace proximity_auth
 
 #endif  // COMPONENTS_PROXIMITY_AUTH_BLE_BLUETOOTH_LOW_ENERGY_CONNECTION_H_