Substituting legacy protocol with uWeave protocol

components/proximity_auth/ble/bluetooth_low_energy_weave_packet_generator.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_generator.h"
 
 #ifdef OS_WIN
 #include <winsock2.h>
 #else
 #include <netinet/in.h>
 #endif
 
 #include <string.h>
 
 #include <algorithm>
 
 #include "base/logging.h"
 
 namespace proximity_auth {
 namespace weave {
 
 // static.
-BluetoothLowEnergyWeavePacketGenerator::Factory*
+std::shared_ptr<BluetoothLowEnergyWeavePacketGenerator::Factory>
     BluetoothLowEnergyWeavePacketGenerator::Factory::factory_instance_ =
         nullptr;
 
 // static.
 std::unique_ptr<BluetoothLowEnergyWeavePacketGenerator>
 BluetoothLowEnergyWeavePacketGenerator::Factory::NewInstance() {
-  if (factory_instance_ == nullptr) {
-    factory_instance_ = new Factory();
+  if (!factory_instance_) {
+    factory_instance_.reset(new Factory());
   }
   return factory_instance_->BuildInstance();
 }
 
 // static.
 void BluetoothLowEnergyWeavePacketGenerator::Factory::SetInstanceForTesting(
-    Factory* factory) {
+    std::shared_ptr<Factory> factory) {
   factory_instance_ = factory;
 }
 
 std::unique_ptr<BluetoothLowEnergyWeavePacketGenerator>
 BluetoothLowEnergyWeavePacketGenerator::Factory::BuildInstance() {
   return std::unique_ptr<BluetoothLowEnergyWeavePacketGenerator>(
       new BluetoothLowEnergyWeavePacketGenerator());
 }
 
 BluetoothLowEnergyWeavePacketGenerator::BluetoothLowEnergyWeavePacketGenerator()
@@ skipping 143 matching lines @@
   DCHECK(packet);
   DCHECK(!packet->empty());
 
   // Last bit is the bit 2 of the packet's first byte and set it to 1.
   packet->at(0) = packet->at(0) | (1 << 2);
 }
 
 }  // namespace weave
 
 }  // namespace proximity_auth