Allow CollectionViewModel/Controller queries without SectionIdentifier

ios/chrome/browser/ui/settings/password_details_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/password_details_collection_view_controller.h"
 
 #include "base/mac/foundation_util.h"
 #include "base/strings/sys_string_conversions.h"
 #include "components/autofill/core/common/password_form.h"
 #include "components/password_manager/core/browser/affiliation_utils.h"
@@ skipping 192 matching lines @@
 // |_plainTextPasswordShown|.
 - (void)toggleShowHideButton {
   CollectionViewModel* model = self.collectionViewModel;
   NSIndexPath* path = [model indexPathForItemType:ItemTypeShowHide
                                 sectionIdentifier:SectionIdentifierPassword];
   CollectionViewTextItem* item =
       base::mac::ObjCCastStrict<CollectionViewTextItem>(
           [model itemAtIndexPath:path]);
   item.text = [self showHideButtonText];
   item.textColor = [[MDCPalette cr_bluePalette] tint500];
-  [self reconfigureCellsForItems:@[ item ]
-         inSectionWithIdentifier:SectionIdentifierPassword];
+  [self reconfigureCellsForItems:@[ item ]];
   [self.collectionView.collectionViewLayout invalidateLayout];
 }
 
 - (void)showPassword {
   if (_plainTextPasswordShown) {
     return;
   }
 
   if ([_weakReauthenticationModule canAttemptReauth]) {
     __weak PasswordDetailsCollectionViewController* weakSelf = self;
     void (^showPasswordHandler)(BOOL) = ^(BOOL success) {
       PasswordDetailsCollectionViewController* strongSelf = weakSelf;
       if (!strongSelf || !success)
         return;
       PasswordDetailsItem* passwordItem = strongSelf->_passwordItem;
       passwordItem.showingText = YES;
-      [strongSelf reconfigureCellsForItems:@[ passwordItem ]
-                   inSectionWithIdentifier:SectionIdentifierPassword];
+      [strongSelf reconfigureCellsForItems:@[ passwordItem ]];
       [[strongSelf collectionView].collectionViewLayout invalidateLayout];
       strongSelf->_plainTextPasswordShown = YES;
       [strongSelf toggleShowHideButton];
     };
 
     [_weakReauthenticationModule
         attemptReauthWithLocalizedReason:
             l10n_util::GetNSString(IDS_IOS_SETTINGS_PASSWORD_REAUTH_REASON_SHOW)
                                  handler:showPasswordHandler];
   }
 }
 
 - (void)hidePassword {
   if (!_plainTextPasswordShown) {
     return;
   }
   _passwordItem.showingText = NO;
-  [self reconfigureCellsForItems:@[ _passwordItem ]
-         inSectionWithIdentifier:SectionIdentifierPassword];
+  [self reconfigureCellsForItems:@[ _passwordItem ]];
   [self.collectionView.collectionViewLayout invalidateLayout];
   _plainTextPasswordShown = NO;
   [self toggleShowHideButton];
 }
 
 - (void)copyPassword {
   // If the password is displayed in plain text, there is no need to
   // re-authenticate the user when copying the password because they are already
   // granted access to it.
   if (_plainTextPasswordShown) {
@@ skipping 77 matching lines @@
     case ItemTypePassword:
       return [MDCCollectionViewCell
           cr_preferredHeightForWidth:CGRectGetWidth(collectionView.bounds)
                              forItem:item];
     default:
       return MDCCellDefaultOneLineHeight;
   }
 }
 
 @end