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

ios/chrome/browser/web/error_page_generator_unittest.mm

 // Copyright 2017 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 "ios/chrome/browser/web/error_page_generator.h"
-#include "base/mac/scoped_nsobject.h"
 #include "base/strings/sys_string_conversions.h"
 #include "ios/web/public/test/web_test.h"
 #include "ios/web/web_state/error_translation_util.h"
 #import "net/base/mac/url_conversions.h"
 #include "net/base/net_errors.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/gtest_mac.h"
 #import "third_party/ocmock/OCMock/OCMock.h"
 #import "third_party/ocmock/gtest_support.h"
 #include "url/gurl.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 // From static_html_view_controller.mm: callback for the HtmlGenerator protocol.
 typedef void (^HtmlCallback)(NSString*);
 
 // To test the error page generator code, generate  error data, and examine the
 // generated HTML to make sure the expected text has been included. In detail:
 // 1. Use GenerateError to create an NSError object to pass in.
 // 2. Initialize errorPageGenerator_ with NSError objects.
 // 3. Pass the |TestHTMLForError| function to errorPageContent_'s generateHTML
 //    function, along with the string that's expected to appear in the
 //    generated HTML for this error.
@@ skipping 14 matching lines @@
                          NSInteger errorCode) {
     NSDictionary* info = @{
       NSURLErrorFailingURLStringErrorKey :
           base::SysUTF8ToNSString(errorURL.spec())
     };
     return web::NetErrorFromError(
         [NSError errorWithDomain:errorDomain code:errorCode userInfo:info]);
   }
 
   // ErrorPageContent object to be tested.
-  base::scoped_nsobject<ErrorPageGenerator> errorPageGenerator_;
+  ErrorPageGenerator* errorPageGenerator_;
 
   // Mock for the URLLoader that would otherwise handle the HTML produced.
-  base::scoped_nsobject<OCMockObject> mockLoader_;
+  OCMockObject* mockLoader_;
 };
 
 // Test with a timed out error.
 TEST_F(ErrorPageGeneratorTest, TimedOut) {
   GURL errorURL("http://www.google.com");
   NSError* error =
       GenerateError(errorURL, NSURLErrorDomain, kCFURLErrorTimedOut);
-  errorPageGenerator_.reset([[ErrorPageGenerator alloc] initWithError:error
-                                                               isPost:NO
-                                                          isIncognito:NO]);
-  [errorPageGenerator_.get() generateHtml:^(NSString* html) {
+  errorPageGenerator_ =
+      [[ErrorPageGenerator alloc] initWithError:error isPost:NO isIncognito:NO];
+  [errorPageGenerator_ generateHtml:^(NSString* html) {
     TestHTMLForError(html, @"ERR_CONNECTION_TIMED_OUT");
   }];
 }
 
 // Test with a bad URL scheme (see b/7448754).
 TEST_F(ErrorPageGeneratorTest, BadURLScheme) {
   GURL errorURL(
       "itms-appss://itunes.apple.com/gb/app/google-search/id284815942?mt=8");
   NSError* error =
       GenerateError(errorURL, NSURLErrorDomain, kCFURLErrorTimedOut);
-  errorPageGenerator_.reset([[ErrorPageGenerator alloc] initWithError:error
-                                                               isPost:NO
-                                                          isIncognito:NO]);
-  [errorPageGenerator_.get() generateHtml:^(NSString* html) {
+  errorPageGenerator_ =
+      [[ErrorPageGenerator alloc] initWithError:error isPost:NO isIncognito:NO];
+  [errorPageGenerator_ generateHtml:^(NSString* html) {
     TestHTMLForError(html, @"ERR_CONNECTION_TIMED_OUT");
   }];
 }
 
 // Test with an empty GURL object.
 // TODO(ios): [merge 191784] b/8525110 fix the code or the test.
 TEST_F(ErrorPageGeneratorTest, EmptyURLObject) {
   GURL errorURL;
   NSError* error =
       GenerateError(errorURL, NSURLErrorDomain, kCFURLErrorTimedOut);
-  errorPageGenerator_.reset([[ErrorPageGenerator alloc] initWithError:error
-                                                               isPost:NO
-                                                          isIncognito:NO]);
-  [errorPageGenerator_.get() generateHtml:^(NSString* html) {
+  errorPageGenerator_ =
+      [[ErrorPageGenerator alloc] initWithError:error isPost:NO isIncognito:NO];
+  [errorPageGenerator_ generateHtml:^(NSString* html) {
     TestHTMLForError(html, @"ERR_CONNECTION_TIMED_OUT");
   }];
 }