[Smart Lock] Extract the screenlock state to the proximity_auth component.

chrome/browser/chromeos/login/easy_unlock/bootstrap_user_context_initializer.cc

 // Copyright 2014 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 "chrome/browser/chromeos/login/easy_unlock/bootstrap_user_context_initializer.h"
 
 #include <vector>
 
 #include "base/strings/string_util.h"
 #include "chrome/browser/browser_process.h"
@@ skipping 174 matching lines @@
   LOG(ERROR) << "Auth error.";
   Notify(false);
 }
 
 void BootstrapUserContextInitializer::OnNetworkError(int response_code) {
   LOG(ERROR) << "Network error.";
   Notify(false);
 }
 
 void BootstrapUserContextInitializer::OnScreenlockStateChanged(
-    EasyUnlockScreenlockStateHandler::State state) {
+    proximity_auth::ScreenlockState state) {
   // TODO(xiyuan): Add timeout and hook up with error UI after
   //     http://crbug.com/471067.
-  if (state != EasyUnlockScreenlockStateHandler::STATE_AUTHENTICATED)
+  if (state != proximity_auth::ScreenlockState::AUTHENTICATED)
     return;
 
   EasyUnlockService* service =
       EasyUnlockService::Get(ProfileHelper::GetSigninProfile());
   service->RemoveObserver(this);
 
   service->AttemptAuth(
       user_context_.GetUserID(),
       base::Bind(&BootstrapUserContextInitializer::OnEasyUnlockAuthenticated,
                  weak_ptr_factory_.GetWeakPtr()));
 }
 
 }  // namespace chromeos