Clean up Smart Lock cryptohome keys logic:

chrome/browser/signin/easy_unlock_service_signin_chromeos.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_signin_chromeos.h"
 
 #include "base/basictypes.h"
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/logging.h"
@@ skipping 120 matching lines @@
   if (!data)
     return NULL;
   return &data->remote_devices_value;
 }
 
 void EasyUnlockServiceSignin::SetRemoteDevices(
     const base::ListValue& devices) {
   NOTREACHED();
 }
 
-void EasyUnlockServiceSignin::ClearRemoteDevices() {
-  NOTREACHED();
-}
-
 void EasyUnlockServiceSignin::RunTurnOffFlow() {
   NOTREACHED();
 }
 
 void EasyUnlockServiceSignin::ResetTurnOffFlow() {
   NOTREACHED();
 }
 
 EasyUnlockService::TurnOffFlowStatus
     EasyUnlockServiceSignin::GetTurnOffFlowStatus() const {
@@ skipping 233 matching lines @@
     return NULL;
 
   std::map<std::string, UserData*>::const_iterator it =
       user_data_.find(user_id_);
   if (it == user_data_.end())
     return NULL;
   if (it->second->state != USER_DATA_STATE_LOADED)
     return NULL;
   return it->second;
 }