Allow CollectionViewModel/Controller queries without SectionIdentifier

ios/chrome/browser/ui/settings/save_passwords_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/save_passwords_collection_view_controller.h"
 
 #include <memory>
 #include <vector>
 
 #include "base/ios/ios_util.h"
@@ skipping 377 matching lines @@
 
 #pragma mark - BooleanObserver
 
 - (void)booleanDidChange:(id<ObservableBoolean>)observableBoolean {
   DCHECK_EQ(observableBoolean, passwordManagerEnabled_.get());
 
   // Update the item.
   savePasswordsItem_.get().on = [passwordManagerEnabled_ value];
 
   // Update the cell.
-  [self reconfigureCellsForItems:@[ savePasswordsItem_ ]
-         inSectionWithIdentifier:SectionIdentifierSavePasswordsSwitch];
+  [self reconfigureCellsForItems:@[ savePasswordsItem_ ]];
 
   // Update the rest of the UI.
   [self.editor setEditing:NO];
   [self updateEditButton];
   [self reloadData];
 }
 
 #pragma mark - Actions
 
 - (void)savePasswordsSwitchChanged:(UISwitch*)switchView {
@@ skipping 185 matching lines @@
 
 - (void)updateSuccessfulReauthTime {
   successfulReauthTime_.reset([[NSDate alloc] init]);
 }
 
 - (NSDate*)lastSuccessfulReauthTime {
   return successfulReauthTime_.get();
 }
 
 @end