Revert of Add U2F request state machines

device/u2f/u2f_register.cc

-// Copyright 2017 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 "u2f_register.h"
-
-#include "base/memory/ptr_util.h"
-
-namespace device {
-
-U2fRegister::U2fRegister(const std::vector<uint8_t>& challenge_hash,
-                         const std::vector<uint8_t>& app_param,
-                         const ResponseCallback& cb)
-    : U2fRequest(cb),
-      challenge_hash_(challenge_hash),
-      app_param_(app_param),
-      weak_factory_(this) {}
-
-U2fRegister::~U2fRegister() {}
-
-// static
-std::unique_ptr<U2fRequest> U2fRegister::TryRegistration(
-    const std::vector<uint8_t>& challenge_hash,
-    const std::vector<uint8_t>& app_param,
-    const ResponseCallback& cb) {
-  std::unique_ptr<U2fRequest> request =
-      base::MakeUnique<U2fRegister>(challenge_hash, app_param, cb);
-  request->Start();
-  return request;
-}
-
-void U2fRegister::TryDevice() {
-  DCHECK(current_device_);
-
-  current_device_->Register(
-      app_param_, challenge_hash_,
-      base::Bind(&U2fRegister::OnTryDevice, weak_factory_.GetWeakPtr()));
-}
-
-void U2fRegister::OnTryDevice(U2fReturnCode return_code,
-                              std::vector<uint8_t> response_data) {
-  switch (return_code) {
-    case U2fReturnCode::SUCCESS:
-      state_ = State::COMPLETE;
-      cb_.Run(return_code, response_data);
-      break;
-    case U2fReturnCode::CONDITIONS_NOT_SATISFIED:
-      // Waiting for user touch, move on and try this device later
-      state_ = State::IDLE;
-      Transition();
-      break;
-    default:
-      state_ = State::IDLE;
-      // An error has occured, quit trying this device
-      current_device_ = nullptr;
-      Transition();
-      break;
-  }
-}
-
-}  // namespace device