Fix few minor easy unlock bugs

chrome/browser/signin/easy_unlock_service.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/signin/easy_unlock_service.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/memory/ref_counted.h"
@@ skipping 113 matching lines @@
 
 // static
 void EasyUnlockService::RegisterProfilePrefs(
     user_prefs::PrefRegistrySyncable* registry) {
   registry->RegisterBooleanPref(
       prefs::kEasyUnlockEnabled,
       false,
       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
   registry->RegisterBooleanPref(
       prefs::kEasyUnlockShowTutorial,
-      false,
+      true,
       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
   registry->RegisterDictionaryPref(
       prefs::kEasyUnlockPairing,
       new base::DictionaryValue(),
       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
   registry->RegisterBooleanPref(
       prefs::kEasyUnlockAllowed,
       true,
       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
 }
@@ skipping 209 matching lines @@
   turn_off_flow_.reset();
 
   if (!success) {
     SetTurnOffFlowStatus(FAIL);
     return;
   }
 
   ClearRemoteDevices();
   SetTurnOffFlowStatus(IDLE);
 
+  // Make sure lock screen state set by the extension gets reset.
+  screenlock_state_handler_.reset();
+
   if (GetComponentLoader(profile_)->Exists(extension_misc::kEasyUnlockAppId)) {
     extensions::ExtensionSystem* extension_system =
         extensions::ExtensionSystem::Get(profile_);
     extension_system->extension_service()->ReloadExtension(
         extension_misc::kEasyUnlockAppId);
   }
 }