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

ios/chrome/browser/ui/qr_scanner/qr_scanner_view_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 <AVFoundation/AVFoundation.h>
 #import <EarlGrey/EarlGrey.h>
 #import <UIKit/UIKit.h>
 
-#import "base/mac/scoped_nsobject.h"
 #include "base/strings/sys_string_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #include "components/strings/grit/components_strings.h"
 #include "components/version_info/version_info.h"
 #import "ios/chrome/app/main_controller.h"
 #include "ios/chrome/browser/chrome_switches.h"
 #import "ios/chrome/browser/ui/browser_view_controller.h"
 #import "ios/chrome/browser/ui/commands/generic_chrome_command.h"
 #include "ios/chrome/browser/ui/commands/ios_command_ids.h"
 #include "ios/chrome/browser/ui/icons/chrome_icon.h"
 #include "ios/chrome/browser/ui/qr_scanner/camera_controller.h"
 #include "ios/chrome/browser/ui/qr_scanner/qr_scanner_view.h"
 #include "ios/chrome/browser/ui/qr_scanner/qr_scanner_view_controller.h"
 #include "ios/chrome/browser/ui/toolbar/web_toolbar_controller.h"
 #include "ios/chrome/grit/ios_chromium_strings.h"
 #include "ios/chrome/grit/ios_strings.h"
 #import "ios/chrome/test/app/chrome_test_util.h"
 #import "ios/chrome/test/base/scoped_block_swizzler.h"
 #import "ios/chrome/test/earl_grey/chrome_matchers.h"
 #import "ios/chrome/test/earl_grey/chrome_test_case.h"
 #include "ios/shared/chrome/browser/ui/omnibox/location_bar_delegate.h"
 #import "ios/web/public/test/http_server/http_server.h"
 #include "ios/web/public/test/http_server/http_server_util.h"
 #import "third_party/ocmock/OCMock/OCMock.h"
 #import "ui/base/l10n/l10n_util.h"
 #import "ui/base/l10n/l10n_util_mac.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 using namespace chrome_test_util;
 using namespace qr_scanner;
 
 namespace {
 
 char kTestURL[] = "http://testurl";
 char kTestURLResponse[] = "Test URL page";
 char kTestQuery[] = "testquery";
 char kTestQueryURL[] = "http://searchurl/testquery";
 char kTestQueryResponse[] = "Test query page";
@@ skipping 56 matching lines @@
 // Returns the GREYMatcher for the Cancel button to dismiss a UIAlertController.
 id<GREYMatcher> DialogCancelButton() {
   return grey_allOf(
       grey_text(l10n_util::GetNSString(IDS_IOS_QR_SCANNER_ALERT_CANCEL)),
       grey_accessibilityTrait(UIAccessibilityTraitStaticText), nil);
 }
 
 // Opens the QR Scanner view using a command.
 // TODO(crbug.com/629776): Replace the command call with a UI action.
 void ShowQRScannerWithCommand() {
-  base::scoped_nsobject<GenericChromeCommand> command(
-      [[GenericChromeCommand alloc] initWithTag:IDC_SHOW_QR_SCANNER]);
+  GenericChromeCommand* command =
+      [[GenericChromeCommand alloc] initWithTag:IDC_SHOW_QR_SCANNER];
   chrome_test_util::RunCommandWithActiveViewController(command);
 }
 
 // Taps the |button|.
 void TapButton(id<GREYMatcher> button) {
   [[EarlGrey selectElementWithMatcher:button] performAction:grey_tap()];
 }
 
 // Appends the given |editText| to the |text| already in the omnibox and presses
 // the keyboard return key.
@@ skipping 691 matching lines @@
 // Test that the correct page is loaded if the scanner result is a search query
 // which is then manually edited.
 - (void)testReceivingQRScannerSearchQueryResultAndEditingTheQuery {
   [self swizzleWebToolbarControllerLoadGURLFromLocationBar:_testQueryEdited];
   [self doTestReceivingResult:kTestQuery
                      response:kTestQueryEditedResponse
                          edit:@"\bedited"];
 }
 
 @end