Minor change to the uWeave packet generator to allow inheritance

components/proximity_auth/ble/bluetooth_low_energy_weave_packet_generator.h

 // Copyright 2016 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_WEAVE_PACKET_GENERATOR_H_
 #define COMPONENTS_PROXIMITY_AUTH_BLE_BLUETOOTH_LOW_ENERGY_WEAVE_PACKET_GENERATOR_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 20 matching lines @@
 
    protected:
     // Exposed for testing.
     virtual std::unique_ptr<BluetoothLowEnergyWeavePacketGenerator>
     BuildInstance();
 
    private:
     static Factory* factory_instance_;
   };
 
-  Packet CreateConnectionRequest();
-  Packet CreateConnectionResponse();
-  Packet CreateConnectionClose(ReasonForClose reason_for_close);
+  virtual Packet CreateConnectionRequest();
+  virtual Packet CreateConnectionResponse();
+  virtual Packet CreateConnectionClose(ReasonForClose reason_for_close);
 
   // Packet size must be greater than or equal to 20.
-  void SetMaxPacketSize(uint16_t size);
+  virtual void SetMaxPacketSize(uint16_t size);
 
   // Will crash if message is empty.
-  std::vector<Packet> EncodeDataMessage(std::string message);
+  virtual std::vector<Packet> EncodeDataMessage(std::string message);
 
  protected:
   BluetoothLowEnergyWeavePacketGenerator();
 
  private:
   void SetShortField(uint32_t byte_offset, uint16_t val, Packet* packet);
   void SetPacketTypeBit(PacketType val, Packet* packet);
   void SetControlCommand(ControlCommand val, Packet* packet);
   void SetPacketCounter(Packet* packet);
   void SetDataFirstBit(Packet* packet);
   void SetDataLastBit(Packet* packet);
 
   // The default max packet length is 20 unless SetDataPacketLength() is called
   // and specified otherwise.
   uint16_t max_packet_size_;
 
   // Counter for the number of packets sent, starting at 0.
   uint8_t next_packet_counter_;
 };
 
 }  // namespace weave
 
 }  // namespace proximity_auth
 
 #endif  // COMPONENTS_PROXIMITY_AUTH_BLE_BLUETOOTH_LOW_ENERGY_WEAVE_PACKET_GENERATOR_H_