[EasyUnlock] Fix UI shown on lock screen when Bluetooth is disabled.

components/proximity_auth/unlock_manager_impl.cc

 // Copyright 2015 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/unlock_manager_impl.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
@@ skipping 334 matching lines @@
 void UnlockManagerImpl::OnGotSignInChallenge(const std::string& challenge) {
   PA_LOG(INFO) << "Got sign-in challenge, sending for decryption...";
   GetMessenger()->RequestDecryption(challenge);
 }
 
 ScreenlockState UnlockManagerImpl::GetScreenlockState() {
   if (!life_cycle_ ||
       life_cycle_->GetState() == RemoteDeviceLifeCycle::State::STOPPED)
     return ScreenlockState::INACTIVE;
 
+  if (!bluetooth_adapter_ || !bluetooth_adapter_->IsPowered())
+    return ScreenlockState::NO_BLUETOOTH;
+
   if (IsUnlockAllowed())
     return ScreenlockState::AUTHENTICATED;
 
   if (life_cycle_->GetState() ==
       RemoteDeviceLifeCycle::State::AUTHENTICATION_FAILED)
     return ScreenlockState::PHONE_NOT_AUTHENTICATED;
 
   if (is_waking_up_ ||
       life_cycle_->GetState() == RemoteDeviceLifeCycle::State::AUTHENTICATING ||
       life_cycle_->GetState() ==
           RemoteDeviceLifeCycle::State::FINDING_CONNECTION)
     return ScreenlockState::BLUETOOTH_CONNECTING;
 
-  if (!bluetooth_adapter_ || !bluetooth_adapter_->IsPowered())
-    return ScreenlockState::NO_BLUETOOTH;
-
   Messenger* messenger = GetMessenger();
   if (screenlock_type_ == ProximityAuthSystem::SIGN_IN && messenger &&
       !messenger->SupportsSignIn())
     return ScreenlockState::PHONE_UNSUPPORTED;
 
   // If the RSSI is too low, then the remote device is nowhere near the local
   // device. This message should take priority over messages about screen lock
   // states.
   if (!proximity_monitor_->IsUnlockAllowed())
     return ScreenlockState::RSSI_TOO_LOW;
@@ skipping 102 matching lines @@
 
 Messenger* UnlockManagerImpl::GetMessenger() {
   // TODO(tengs): We should use a weak pointer to hold the Messenger instance
   // instead.
   if (!life_cycle_)
     return nullptr;
   return life_cycle_->GetMessenger();
 }
 
 }  // namespace proximity_auth