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

ios/chrome/browser/web/cache_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 "base/mac/scoped_nsobject.h"
 #include "base/memory/ptr_util.h"
 #include "base/strings/stringprintf.h"
 #include "components/content_settings/core/browser/host_content_settings_map.h"
 #include "components/content_settings/core/common/content_settings.h"
 #include "ios/chrome/browser/content_settings/host_content_settings_map_factory.h"
 #import "ios/chrome/browser/ui/commands/generic_chrome_command.h"
 #include "ios/chrome/browser/ui/commands/ios_command_ids.h"
 #import "ios/chrome/test/app/chrome_test_util.h"
 #include "ios/chrome/test/app/history_test_util.h"
 #include "ios/chrome/test/app/navigation_test_util.h"
 #include "ios/chrome/test/app/web_view_interaction_test_util.h"
 #import "ios/chrome/test/earl_grey/chrome_assertions.h"
 #import "ios/chrome/test/earl_grey/chrome_earl_grey.h"
 #import "ios/chrome/test/earl_grey/chrome_matchers.h"
 #import "ios/chrome/test/earl_grey/chrome_test_case.h"
 #import "ios/testing/wait_util.h"
 #import "ios/web/public/test/http_server.h"
 #include "ios/web/public/test/http_server_util.h"
 #include "ios/web/public/test/response_providers/html_response_provider.h"
 #include "url/gurl.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 using chrome_test_util::WebViewContainingText;
 using web::test::HttpServer;
 
 namespace {
 
 // First page for cache testing.
 const char kCacheTestFirstPageURL[] = "http://cacheTestFirstPage";
 
 // Second page for cache testing.
 const char kCacheTestSecondPageURL[] = "http://cacheTestSecondPage";
@@ skipping 111 matching lines @@
 
 // Tests the browser cache behavior when navigating to cached pages.
 @interface CacheTestCase : ChromeTestCase
 @end
 
 @implementation CacheTestCase
 
 // Reloads the web view and waits for the loading to complete.
 // TODO(crbug.com/638674): Evaluate if this can move to shared code
 - (void)reloadPage {
-  base::scoped_nsobject<GenericChromeCommand> reloadCommand(
-      [[GenericChromeCommand alloc] initWithTag:IDC_RELOAD]);
+  GenericChromeCommand* reloadCommand =
+      [[GenericChromeCommand alloc] initWithTag:IDC_RELOAD];
   chrome_test_util::RunCommandWithActiveViewController(reloadCommand);
 
   [ChromeEarlGrey waitForPageToFinishLoading];
 }
 
 // Navigates back to the previous webpage.
 // TODO(crbug.com/638674): Evaluate if this can move to shared code.
 - (void)goBack {
-  base::scoped_nsobject<GenericChromeCommand> backCommand(
-      [[GenericChromeCommand alloc] initWithTag:IDC_BACK]);
+  GenericChromeCommand* backCommand =
+      [[GenericChromeCommand alloc] initWithTag:IDC_BACK];
   chrome_test_util::RunCommandWithActiveViewController(backCommand);
 
   [ChromeEarlGrey waitForPageToFinishLoading];
 }
 
 // Tests caching behavior on navigate back and page reload. Navigate back should
 // use the cached page. Page reload should use cache-control in the request
 // header and show updated page.
 - (void)testCachingBehaviorOnNavigateBackAndPageReload {
   web::test::SetUpHttpServer(base::MakeUnique<CacheTestResponseProvider>());
@@ skipping 98 matching lines @@
 
   // Verify title and hitCount. Cache should not be used.
   [[EarlGrey selectElementWithMatcher:WebViewContainingText("First Page")]
       assertWithMatcher:grey_notNil()];
   [[EarlGrey
       selectElementWithMatcher:WebViewContainingText("serverHitCounter: 2")]
       assertWithMatcher:grey_notNil()];
 }
 
 @end