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

ios/chrome/browser/ui/ntp/new_tab_page_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>
 
 #include "components/strings/grit/components_strings.h"
 #import "ios/chrome/browser/ui/commands/generic_chrome_command.h"
 #include "ios/chrome/browser/ui/commands/ios_command_ids.h"
 #import "ios/chrome/browser/ui/ntp/new_tab_page_controller.h"
 #include "ios/chrome/browser/ui/ui_util.h"
 #include "ios/chrome/grit/ios_strings.h"
 #import "ios/chrome/test/app/chrome_test_util.h"
 #import "ios/chrome/test/app/tab_test_util.h"
 #import "ios/chrome/test/earl_grey/accessibility_util.h"
 #import "ios/chrome/test/earl_grey/chrome_matchers.h"
 #import "ios/chrome/test/earl_grey/chrome_test_case.h"
 #import "ios/testing/earl_grey/disabled_test_macros.h"
 #import "ios/testing/wait_util.h"
 #include "ui/base/l10n/l10n_util.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 @implementation NewTabPageController (ExposedForTesting)
 - (GoogleLandingController*)googleLandingController {
   return googleLandingController_;
 }
 @end
 
 @interface GoogleLandingController (ExposedForTesting)
 - (BOOL)scrolledToTop;
 - (BOOL)animateHeader;
 @end
@@ skipping 33 matching lines @@
   if (IsIPadIdiom()) {
     [ntp_controller selectPanel:panel_type];
   } else {
     NSUInteger tag = 0;
     if (panel_type == NewTabPage::PanelIdentifier::kBookmarksPanel) {
       tag = IDC_SHOW_BOOKMARK_MANAGER;
     } else if (panel_type == NewTabPage::PanelIdentifier::kOpenTabsPanel) {
       tag = IDC_SHOW_OTHER_DEVICES;
     }
     if (tag) {
-      base::scoped_nsobject<GenericChromeCommand> command(
-          [[GenericChromeCommand alloc] initWithTag:tag]);
+      GenericChromeCommand* command =
+          [[GenericChromeCommand alloc] initWithTag:tag];
       chrome_test_util::RunCommandWithActiveViewController(command);
     }
   }
   [[GREYUIThreadExecutor sharedInstance] drainUntilIdle];
 }
 
 void AssertNTPScrolledToTop(bool scrolledToTop) {
   [[GREYUIThreadExecutor sharedInstance] drainUntilIdle];
   NewTabPageController* ntp_controller =
       chrome_test_util::GetCurrentNewTabPageController();
@@ skipping 218 matching lines @@
   AssertNTPScrolledToTop(YES);
 
   // Check that tab switcher and tools menu buttons are not on screen.
   [[EarlGrey selectElementWithMatcher:grey_accessibilityLabel(tabSwitcherLabel)]
       assertWithMatcher:grey_notVisible()];
   [[EarlGrey selectElementWithMatcher:grey_accessibilityLabel(toolsMenuLabel)]
       assertWithMatcher:grey_notVisible()];
 }
 
 @end