Display offline availability on ContentSuggestions

ios/chrome/browser/ui/reading_list/reading_list_utils.mm

 // Copyright 2017 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.
 
 #import "ios/chrome/browser/ui/reading_list/reading_list_utils.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
 
+namespace reading_list {
+
 ReadingListUIDistillationStatus UIStatusFromModelStatus(
     ReadingListEntry::DistillationState distillation_state) {
   switch (distillation_state) {
     case ReadingListEntry::WILL_RETRY:
     case ReadingListEntry::PROCESSING:
     case ReadingListEntry::WAITING:
       return ReadingListUIDistillationStatusPending;
     case ReadingListEntry::PROCESSED:
       return ReadingListUIDistillationStatusSuccess;
     case ReadingListEntry::DISTILLATION_ERROR:
       return ReadingListUIDistillationStatusFailure;
   }
 }
+
+}  // namespace reading_list