Allow CollectionViewModel/Controller queries without SectionIdentifier

ios/chrome/browser/ui/settings/translate_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/translate_collection_view_controller.h"
 
 #import <Foundation/Foundation.h>
 #include <memory>
 
 #include "base/mac/foundation_util.h"
@@ skipping 211 matching lines @@
 
 #pragma mark - BooleanObserver
 
 - (void)booleanDidChange:(id<ObservableBoolean>)observableBoolean {
   DCHECK_EQ(observableBoolean, _translationEnabled.get());
 
   // Update the item.
   _translationItem.get().on = [_translationEnabled value];
 
   // Update the cell.
-  [self reconfigureCellsForItems:@[ _translationItem ]
-         inSectionWithIdentifier:SectionIdentifierTranslate];
+  [self reconfigureCellsForItems:@[ _translationItem ]];
 }
 
 #pragma mark - Actions
 
 - (void)translateToggled:(id)sender {
   NSIndexPath* switchPath = [self.collectionViewModel
       indexPathForItemType:ItemTypeTranslate
          sectionIdentifier:SectionIdentifierTranslate];
 
   CollectionViewSwitchItem* switchItem =
       base::mac::ObjCCastStrict<CollectionViewSwitchItem>(
           [self.collectionViewModel itemAtIndexPath:switchPath]);
   CollectionViewSwitchCell* switchCell =
       base::mac::ObjCCastStrict<CollectionViewSwitchCell>(
           [self.collectionView cellForItemAtIndexPath:switchPath]);
 
   DCHECK_EQ(switchCell.switchView, sender);
   BOOL isOn = switchCell.switchView.isOn;
   switchItem.on = isOn;
   [_translationEnabled setValue:isOn];
 }
 
 @end