Substituting legacy protocol with uWeave protocol

components/proximity_auth/ble/bluetooth_low_energy_weave_packet_receiver.cc

 // 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.
 
 #include "components/proximity_auth/ble/bluetooth_low_energy_weave_packet_receiver.h"
 
 #ifdef OS_WIN
 #include <winsock2.h>
 #else
 #include <netinet/in.h>
 #endif
 
 #include "components/proximity_auth/logging/logging.h"
 
 namespace proximity_auth {
 namespace weave {
 namespace {
 
 const uint16_t kMaxInitControlPacketSize = 20;
 const uint16_t kMaxPacketSizeLowerBound = 20;
 
 }  // namespace
 
-BluetoothLowEnergyWeavePacketReceiver::Factory*
+std::shared_ptr<BluetoothLowEnergyWeavePacketReceiver::Factory>
     BluetoothLowEnergyWeavePacketReceiver::Factory::factory_instance_ = nullptr;
 
 // static
 std::unique_ptr<BluetoothLowEnergyWeavePacketReceiver>
 BluetoothLowEnergyWeavePacketReceiver::Factory::NewInstance(
     ReceiverType receiver_type) {
-  if (factory_instance_ == nullptr) {
-    factory_instance_ = new Factory();
+  if (!factory_instance_) {
+    factory_instance_.reset(new Factory());
   }
   return factory_instance_->BuildInstance(receiver_type);
 }
 
 // static
 void BluetoothLowEnergyWeavePacketReceiver::Factory::SetInstanceForTesting(
-    Factory* factory) {
+    std::shared_ptr<Factory> factory) {
   factory_instance_ = factory;
 }
 
 std::unique_ptr<BluetoothLowEnergyWeavePacketReceiver>
 BluetoothLowEnergyWeavePacketReceiver::Factory::BuildInstance(
     ReceiverType receiver_type) {
   return std::unique_ptr<BluetoothLowEnergyWeavePacketReceiver>(
       new BluetoothLowEnergyWeavePacketReceiver(receiver_type));
 }
 
@@ skipping 392 matching lines @@
 
 uint16_t BluetoothLowEnergyWeavePacketReceiver::GetConceptualMaxPacketSize() {
   if (!max_packet_size_)
     return kMaxPacketSizeLowerBound;
   return max_packet_size_;
 }
 
 }  // namespace weave
 
 }  // namespace proximity_auth