[ProximityAuth] Remote static initializers from uWeave classes.

components/cryptauth/ble/bluetooth_low_energy_weave_packet_receiver.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_CRYPTAUTH_BLE_BLUETOOTH_LOW_ENERGY_WEAVE_PACKET_RECEIVER_H_
 #define COMPONENTS_CRYPTAUTH_BLE_BLUETOOTH_LOW_ENERGY_WEAVE_PACKET_RECEIVER_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 96 matching lines @@
     UNRECOGNIZED_REASON_FOR_CLOSE,
     PACKET_OUT_OF_SEQUENCE
   };
 
   class Factory {
    public:
     static std::unique_ptr<BluetoothLowEnergyWeavePacketReceiver> NewInstance(
         ReceiverType receiver_type);
 
     // Exposed for testing.
-    static void SetInstanceForTesting(std::shared_ptr<Factory> factory);
+    static void SetInstanceForTesting(Factory* factory);
 
    protected:
     // Exposed for testing.
     virtual std::unique_ptr<BluetoothLowEnergyWeavePacketReceiver>
     BuildInstance(ReceiverType receiver_type);
 
    private:
-    static std::shared_ptr<Factory> factory_instance_;
+    static Factory* factory_instance_;
   };
 
   ~BluetoothLowEnergyWeavePacketReceiver();
 
   typedef std::vector<uint8_t> Packet;
 
   // Get the receiver’s state.
   virtual State GetState();
 
   // Return the packet size that the receiver parsed out of request/response.
@@ skipping 77 matching lines @@
   // The error the receiver encountered while processing packets.
   // Used for debugging purproses.
   ReceiverError receiver_error_;
 };
 
 }  // namespace weave
 
 }  // namespace cryptauth
 
 #endif  // COMPONENTS_CRYPTAUTH_BLE_BLUETOOTH_LOW_ENERGY_WEAVE_PACKET_RECEIVER_H_