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

ios/chrome/browser/web/forms_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 "base/strings/stringprintf.h"
 #include "base/strings/sys_string_conversions.h"
 #include "components/strings/grit/components_strings.h"
 #include "ios/chrome/browser/ui/ui_util.h"
 #import "ios/chrome/test/app/chrome_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_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/testing/wait_util.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/data_response_provider.h"
 #include "ios/web/public/test/url_test_util.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 using chrome_test_util::ButtonWithAccessibilityLabelId;
 using chrome_test_util::OmniboxText;
 using chrome_test_util::WebViewContainingText;
 
 namespace {
 
 // Response shown on the page of |GetDestinationUrl|.
 const char kDestinationText[] = "bar!";
 
 // Label for the button in the form.
@@ skipping 233 matching lines @@
       assertWithMatcher:grey_notNil()];
 
   [ChromeEarlGrey goBack];
   [ChromeEarlGrey goForward];
 
   // Abort the reload.
   // TODO (crbug.com/705020): Use something like ElementToDismissContextMenu
   // to cancel form repost.
   if (IsIPadIdiom()) {
     // On tablet, dismiss the popover.
-    base::scoped_nsobject<GREYElementMatcherBlock> matcher([
-        [GREYElementMatcherBlock alloc]
+    GREYElementMatcherBlock* matcher = [[GREYElementMatcherBlock alloc]
         initWithMatchesBlock:^BOOL(UIView* view) {
           return [NSStringFromClass([view class]) hasPrefix:@"UIDimmingView"];
         }
         descriptionBlock:^(id<GREYDescription> description) {
           [description appendText:@"class prefixed with UIDimmingView"];
-        }]);
+        }];
     [[EarlGrey selectElementWithMatcher:matcher]
         performAction:grey_tapAtPoint(CGPointMake(50.0f, 50.0f))];
   } else {
     // On handset, dismiss via the cancel button.
     [[EarlGrey selectElementWithMatcher:chrome_test_util::CancelButton()]
         performAction:grey_tap()];
   }
   [ChromeEarlGrey waitForPageToFinishLoading];
 
   // Verify that navigation was cancelled, and forward navigation is possible.
@@ skipping 50 matching lines @@
       ButtonWithAccessibilityLabelId(IDS_HTTP_POST_WARNING_RESEND);
   [[EarlGrey selectElementWithMatcher:resendWarning]
       assertWithMatcher:grey_nil()];
   [[EarlGrey selectElementWithMatcher:WebViewContainingText("GET")]
       assertWithMatcher:grey_notNil()];
   [[EarlGrey selectElementWithMatcher:OmniboxText(destinationURL.GetContent())]
       assertWithMatcher:grey_notNil()];
 }
 
 @end