CollectionViewTextItem should copy accessibilityLabel to the cell

ios/chrome/browser/ui/collection_view/cells/collection_view_text_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/collection_view/cells/collection_view_text_item.h"
 
 #import "ios/chrome/browser/ui/collection_view/cells/collection_view_text_cell.h"
 #import "ios/third_party/material_components_ios/src/components/Palettes/src/MaterialPalettes.h"
 #import "ios/third_party/material_roboto_font_loader_ios/src/src/MaterialRobotoFontLoader.h"
 
@@ skipping 53 matching lines @@
 }
 
 #pragma mark CollectionViewItem
 
 - (void)configureCell:(CollectionViewTextCell*)cell {
   [super configureCell:cell];
   cell.accessoryType = self.accessoryType;
   cell.textLabel.text = self.text;
   cell.detailTextLabel.text = self.detailText;
   cell.isAccessibilityElement = YES;
-  if (self.detailText.length == 0) {
-    cell.accessibilityLabel = self.text;
+  if ([self.accessibilityLabel length] != 0) {
+    cell.accessibilityLabel = self.accessibilityLabel;
   } else {
-    cell.accessibilityLabel =
-        [NSString stringWithFormat:@"%@, %@", self.text, self.detailText];
+    if (self.detailText.length == 0) {
+      cell.accessibilityLabel = self.text;
+    } else {
+      cell.accessibilityLabel =
+          [NSString stringWithFormat:@"%@, %@", self.text, self.detailText];
+    }
   }
 
   // Styling.
   cell.textLabel.font = self.textFont;
   cell.textLabel.textColor = self.textColor;
   cell.textLabel.numberOfLines = self.numberOfTextLines;
   cell.detailTextLabel.font = self.detailTextFont;
   cell.detailTextLabel.textColor = self.detailTextColor;
   cell.detailTextLabel.numberOfLines = self.numberOfDetailTextLines;
 }
 
 @end