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

ios/chrome/browser/ui/activity_services/activity_service_controller_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 <XCTest/XCTest.h>
 
 #include "base/memory/ptr_util.h"
 #include "components/strings/grit/components_strings.h"
 #import "ios/chrome/browser/ui/browser_view_controller_dependency_factory.h"
 #import "ios/chrome/browser/ui/uikit_ui_util.h"
 #include "ios/chrome/grit/ios_strings.h"
 #import "ios/chrome/test/earl_grey/chrome_earl_grey.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"
 #import "ios/third_party/material_components_ios/src/components/Snackbar/src/MaterialSnackbar.h"
 #import "ios/chrome/test/app/chrome_test_util.h"
 #import "ios/web/public/test/earl_grey/web_view_matchers.h"
 #import "ios/web/public/test/http_server.h"
 #import "ios/web/public/test/http_server_util.h"
 #include "ios/web/public/test/response_providers/error_page_response_provider.h"
 #include "ios/web/public/test/response_providers/response_provider.h"
 #include "ui/base/l10n/l10n_util_mac.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 namespace {
 
 // Assert the activity service is visible by checking the "copy" button.
 void AssertActivityServiceVisible() {
   [[EarlGrey
       selectElementWithMatcher:chrome_test_util::ButtonWithAccessibilityLabel(
                                    @"Copy")]
       assertWithMatcher:grey_interactable()];
 }
 
@@ skipping 99 matching lines @@
       assertWithMatcher:grey_interactable()];
 
   // Start the Copy action and verify that the share menu gets dismissed.
   [[EarlGrey
       selectElementWithMatcher:chrome_test_util::ButtonWithAccessibilityLabel(
                                    @"Copy")] performAction:grey_tap()];
   AssertActivityServiceNotVisible();
 }
 
 @end