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

ios/chrome/browser/ui/first_run/first_run_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 "base/mac/scoped_nsobject.h"
 #include "base/strings/sys_string_conversions.h"
 #include "components/metrics/metrics_pref_names.h"
 #include "components/metrics/metrics_reporting_default_state.h"
 #include "components/prefs/pref_member.h"
 #include "components/prefs/pref_service.h"
 #include "components/signin/core/browser/signin_manager.h"
 #import "ios/chrome/app/main_controller.h"
 #include "ios/chrome/browser/application_context.h"
 #import "ios/chrome/browser/geolocation/omnibox_geolocation_controller+Testing.h"
 #import "ios/chrome/browser/geolocation/omnibox_geolocation_controller.h"
 #import "ios/chrome/browser/geolocation/test_location_manager.h"
 #include "ios/chrome/browser/signin/signin_manager_factory.h"
 #include "ios/chrome/browser/sync/sync_setup_service.h"
 #include "ios/chrome/browser/sync/sync_setup_service_factory.h"
 #import "ios/chrome/browser/ui/first_run/first_run_chrome_signin_view_controller.h"
 #include "ios/chrome/browser/ui/first_run/welcome_to_chrome_view_controller.h"
 #include "ios/chrome/grit/ios_strings.h"
 #import "ios/chrome/test/app/chrome_test_util.h"
 #import "ios/chrome/test/earl_grey/chrome_matchers.h"
 #import "ios/chrome/test/earl_grey/chrome_test_case.h"
 #import "ios/public/provider/chrome/browser/signin/fake_chrome_identity.h"
 #import "ios/public/provider/chrome/browser/signin/fake_chrome_identity_service.h"
 #include "ui/base/l10n/l10n_util.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 namespace {
 
 // Returns a fake identity.
 ChromeIdentity* GetFakeIdentity() {
   return [FakeChromeIdentity identityWithEmail:@"foo@gmail.com"
                                         gaiaID:@"fooID"
                                           name:@"Fake Foo"];
 }
 
 // Taps the button with accessibility labelId |message_id|.
@@ skipping 35 matching lines @@
 
   BooleanPrefMember metricsEnabledPref;
   metricsEnabledPref.Init(metrics::prefs::kMetricsReportingEnabled,
                           GetApplicationContext()->GetLocalState());
   metricsEnabledPref.SetValue(NO);
   IntegerPrefMember defaultOptInPref;
   defaultOptInPref.Init(metrics::prefs::kMetricsDefaultOptIn,
                         GetApplicationContext()->GetLocalState());
   defaultOptInPref.SetValue(metrics::EnableMetricsDefault::DEFAULT_UNKNOWN);
 
-  base::scoped_nsobject<TestLocationManager> locationManager(
-      [[TestLocationManager alloc] init]);
+  TestLocationManager* locationManager = [[TestLocationManager alloc] init];
   [locationManager setLocationServicesEnabled:NO];
   [[OmniboxGeolocationController sharedInstance]
       setLocationManager:locationManager];
 }
 
 + (void)tearDown {
   IntegerPrefMember defaultOptInPref;
   defaultOptInPref.Init(metrics::prefs::kMetricsDefaultOptIn,
                         GetApplicationContext()->GetLocalState());
   defaultOptInPref.SetValue(metrics::EnableMetricsDefault::DEFAULT_UNKNOWN);
@@ skipping 115 matching lines @@
                   @"Sync shouldn't have finished its original setup yet");
 
   // Close Settings, user is still signed in and sync is now starting.
   TapButtonWithLabelId(IDS_IOS_NAVIGATION_BAR_DONE_BUTTON);
   AssertAuthenticatedIdentityInActiveProfile(identity);
   GREYAssertTrue(sync_service->HasFinishedInitialSetup(),
                  @"Sync should have finished its original setup");
 }
 
 @end