[ProximityAuth] Remote static initializers from uWeave classes.

components/cryptauth/ble/bluetooth_low_energy_weave_packet_generator.cc

Index: components/cryptauth/ble/bluetooth_low_energy_weave_packet_generator.cc
diff --git a/components/cryptauth/ble/bluetooth_low_energy_weave_packet_generator.cc b/components/cryptauth/ble/bluetooth_low_energy_weave_packet_generator.cc
index 164a47b65de6ac34a65a6e117fdbb721ba02645a..cba14631aaf1099a448e6aea30cdeb9d82721c71 100644
--- a/components/cryptauth/ble/bluetooth_low_energy_weave_packet_generator.cc
+++ b/components/cryptauth/ble/bluetooth_low_energy_weave_packet_generator.cc
@@ -20,7 +20,7 @@ namespace cryptauth {
 namespace weave {
 
 // static.
-std::shared_ptr<BluetoothLowEnergyWeavePacketGenerator::Factory>
+BluetoothLowEnergyWeavePacketGenerator::Factory*
     BluetoothLowEnergyWeavePacketGenerator::Factory::factory_instance_ =
         nullptr;
 
@@ -28,14 +28,14 @@ std::shared_ptr<BluetoothLowEnergyWeavePacketGenerator::Factory>
 std::unique_ptr<BluetoothLowEnergyWeavePacketGenerator>
 BluetoothLowEnergyWeavePacketGenerator::Factory::NewInstance() {
   if (!factory_instance_) {
-    factory_instance_.reset(new Factory());
+    factory_instance_ = new Factory();
   }
   return factory_instance_->BuildInstance();
 }
 
 // static.
 void BluetoothLowEnergyWeavePacketGenerator::Factory::SetInstanceForTesting(
-    std::shared_ptr<Factory> factory) {
+    Factory* factory) {
   factory_instance_ = factory;
 }