Minor change to the uWeave packet generator to allow inheritance

components/proximity_auth/ble/bluetooth_low_energy_weave_packet_generator.h

Index: components/proximity_auth/ble/bluetooth_low_energy_weave_packet_generator.h
diff --git a/components/proximity_auth/ble/bluetooth_low_energy_weave_packet_generator.h b/components/proximity_auth/ble/bluetooth_low_energy_weave_packet_generator.h
index fa70ccd24564319f94e893fef10978d8c7b0d218..52a3aff3f84285e11192147b94f01412f90f484d 100644
--- a/components/proximity_auth/ble/bluetooth_low_energy_weave_packet_generator.h
+++ b/components/proximity_auth/ble/bluetooth_low_energy_weave_packet_generator.h
@@ -38,15 +38,15 @@ class BluetoothLowEnergyWeavePacketGenerator {
     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();