Move ReadingList model to components/reading_list/core

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

 // Copyright 2016 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_collection_view_item.h"
 
 #include "base/strings/sys_string_conversions.h"
 #import "ios/chrome/browser/ui/colors/MDCPalette+CrAdditions.h"
 #import "ios/chrome/browser/ui/favicon_view.h"
 #import "ios/chrome/browser/ui/reading_list/reading_list_collection_view_item_accessibility_delegate.h"
@@ skipping 342 matching lines @@
   return self;
 }
 
 - (void)setDistillationState:
     (ReadingListEntry::DistillationState)distillationState {
   if (_distillationState == distillationState)
     return;
 
   _distillationState = distillationState;
   switch (distillationState) {
-    case ReadingListEntry::ERROR:
+    case ReadingListEntry::DISTILLATION_ERROR:
       [_downloadIndicator setImage:[UIImage imageNamed:kFailureImageString]];
       break;
 
     case ReadingListEntry::PROCESSED:
       [_downloadIndicator setImage:[UIImage imageNamed:kSuccessImageString]];
       break;
 
     // Same behavior for all pre-download states.
     case ReadingListEntry::WAITING:
     case ReadingListEntry::WILL_RETRY:
     case ReadingListEntry::PROCESSING:
       [_downloadIndicator setImage:nil];
       break;
   }
 }
 
 #pragma mark - UICollectionViewCell
 
 - (void)prepareForReuse {
   [self.delegate readingListCellWillPrepareForReload:self];
   self.delegate = nil;
   self.textLabel.text = nil;
   self.detailTextLabel.text = nil;
   self.distillationState = ReadingListEntry::WAITING;
   self.accessibilityCustomActions = nil;
   [super prepareForReuse];
 }
 
 @end