Revert to the old back arrow style with NavigationBar

ios/chrome/browser/ui/settings/translate_ui_egtest.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 <EarlGrey/EarlGrey.h>
 #import <XCTest/XCTest.h>
 
 #import "ios/chrome/browser/ui/settings/settings_collection_view_controller.h"
 #import "ios/chrome/browser/ui/tools_menu/tools_menu_view_controller.h"
 #import "ios/chrome/browser/ui/tools_menu/tools_popup_controller.h"
@@ skipping 40 matching lines @@
   // Assert title and accessibility.
   [[EarlGrey
       selectElementWithMatcher:grey_accessibilityID(
                                    @"translate_settings_view_controller")]
       assertWithMatcher:grey_notNil()];
   chrome_test_util::VerifyAccessibilityForCurrentScreen();
 
   // Close settings.
   [[EarlGrey
       selectElementWithMatcher:grey_allOf(
-                                   grey_accessibilityID(@"back_bar_button"),
+                                   grey_accessibilityID(@"ic_arrow_back"),
                                    grey_accessibilityTrait(
                                        UIAccessibilityTraitButton),
                                    nil)] performAction:grey_tap()];
   [[EarlGrey
       selectElementWithMatcher:grey_allOf(
-                                   grey_accessibilityID(@"back_bar_button"),
+                                   grey_accessibilityID(@"ic_arrow_back"),
                                    grey_accessibilityTrait(
                                        UIAccessibilityTraitButton),
                                    nil)] performAction:grey_tap()];
   [[EarlGrey
       selectElementWithMatcher:chrome_test_util::buttonWithAccessibilityLabelId(
                                    IDS_IOS_NAVIGATION_BAR_DONE_BUTTON)]
       performAction:grey_tap()];
 }
 
 @end