Remove ListValue::Append(raw ptr) on Mac and iOS

ios/chrome/browser/ui/settings/block_popups_collection_view_controller.mm

 // Copyright 2015 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/settings/block_popups_collection_view_controller.h"
 
 #import "base/ios/weak_nsobject.h"
 #include "base/logging.h"
 #import "base/mac/foundation_util.h"
 #import "base/mac/scoped_nsobject.h"
@@ skipping 263 matching lines @@
         entries[i].source != "preference") {
       continue;
     }
     // The content settings UI does not support secondary content settings
     // pattern yet. For content settings set through the content settings UI the
     // secondary pattern is by default a wildcard pattern. Hence users are not
     // able to modify content settings with a secondary pattern other than the
     // wildcard pattern. So only show settings that the user is able to modify.
     if (entries[i].secondary_pattern == ContentSettingsPattern::Wildcard() &&
         entries[i].setting == CONTENT_SETTING_ALLOW) {
-      _exceptions.Append(
-          new base::Value(entries[i].primary_pattern.ToString()));
+      _exceptions.AppendString(entries[i].primary_pattern.ToString());
     } else {
       LOG(ERROR) << "Secondary content settings patterns are not "
                  << "supported by the content settings UI";
     }
   }
 }
 
 - (void)populateExceptionsItems {
   CollectionViewModel* model = self.collectionViewModel;
   [model addSectionWithIdentifier:SectionIdentifierExceptions];
@@ skipping 48 matching lines @@
       [[strongSelf collectionViewModel]
           removeSectionWithIdentifier:SectionIdentifierExceptions];
       [[strongSelf collectionView]
           deleteSections:[NSIndexSet indexSetWithIndex:index]];
     }
                                   completion:nil];
   }
 }
 
 @end