Introduce a layering in the invalidation component as public and impl

components/invalidation/notifier_reason_util.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 "components/invalidation/notifier_reason_util.h"
-
-#include "base/logging.h"
-
-namespace syncer {
-
-InvalidatorState FromNotifierReason(
-    notifier::NotificationsDisabledReason reason) {
-  switch (reason) {
-    case notifier::NO_NOTIFICATION_ERROR:
-      return INVALIDATIONS_ENABLED;
-    case notifier::TRANSIENT_NOTIFICATION_ERROR:
-      return TRANSIENT_INVALIDATION_ERROR;
-    case notifier::NOTIFICATION_CREDENTIALS_REJECTED:
-      return INVALIDATION_CREDENTIALS_REJECTED;
-    default:
-      NOTREACHED();
-      return DEFAULT_INVALIDATION_ERROR;
-  }
-}
-
-notifier::NotificationsDisabledReason ToNotifierReasonForTest(
-    InvalidatorState state) {
-  switch (state) {
-    case TRANSIENT_INVALIDATION_ERROR:
-      return notifier::TRANSIENT_NOTIFICATION_ERROR;
-    case INVALIDATION_CREDENTIALS_REJECTED:
-      return notifier::NOTIFICATION_CREDENTIALS_REJECTED;
-    case INVALIDATIONS_ENABLED:
-      // Fall through.
-    default:
-      NOTREACHED();
-      return notifier::TRANSIENT_NOTIFICATION_ERROR;
-  }
-}
-
-}  // namespace syncer