[ObjC ARC] Converts ios/chrome/browser/ui/settings:eg_tests to ARC.

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"
 #include "ios/chrome/browser/ui/tools_menu/tools_menu_constants.h"
 #import "ios/chrome/browser/ui/tools_menu/tools_popup_controller.h"
 #include "ios/chrome/grit/ios_strings.h"
 #include "ios/chrome/test/earl_grey/accessibility_util.h"
 #import "ios/chrome/test/earl_grey/chrome_earl_grey_ui.h"
 #import "ios/chrome/test/earl_grey/chrome_matchers.h"
 #import "ios/chrome/test/earl_grey/chrome_test_case.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 using chrome_test_util::NavigationBarDoneButton;
 
 namespace {
 // Displacement for scroll action.
 const CGFloat kScrollDisplacement = 50.0;
 }  // namespace
 @interface TranslateUITestCase : ChromeTestCase
 @end
 
 @implementation TranslateUITestCase
@@ skipping 41 matching lines @@
       selectElementWithMatcher:grey_allOf(
                                    grey_accessibilityID(@"ic_arrow_back"),
                                    grey_accessibilityTrait(
                                        UIAccessibilityTraitButton),
                                    nil)] performAction:grey_tap()];
   [[EarlGrey selectElementWithMatcher:NavigationBarDoneButton()]
       performAction:grey_tap()];
 }
 
 @end