[ObjC ARC] Converts ios/chrome/browser/ui/settings:unit_tests to ARC.

ios/chrome/browser/ui/settings/import_data_collection_view_controller_unittest.mm

 // Copyright 2015 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/ui/settings/import_data_collection_view_controller.h"
 
 #include "base/mac/foundation_util.h"
 #include "base/strings/sys_string_conversions.h"
 #import "ios/chrome/browser/ui/collection_view/cells/collection_view_detail_item.h"
 #import "ios/chrome/browser/ui/collection_view/collection_view_controller_test.h"
 #import "ios/chrome/browser/ui/collection_view/collection_view_model.h"
 #import "ios/chrome/browser/ui/settings/cells/card_multiline_item.h"
 #include "ios/chrome/grit/ios_strings.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #import "testing/gtest_mac.h"
 #include "testing/platform_test.h"
 #include "ui/base/l10n/l10n_util_mac.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 @interface ImportDataControllerTestDelegate
     : NSObject<ImportDataControllerDelegate>
 @property(nonatomic, readonly) BOOL didChooseClearDataPolicyCalled;
 @property(nonatomic, readonly) ShouldClearData shouldClearData;
 @end
 
 @implementation ImportDataControllerTestDelegate
 
 @synthesize didChooseClearDataPolicyCalled = _didChooseClearDataPolicyCalled;
 @synthesize shouldClearData = _shouldClearData;
@@ skipping 12 matching lines @@
     : public CollectionViewControllerTest {
  public:
   ImportDataControllerTestDelegate* delegate() { return delegate_; }
 
  protected:
   void SetUp() override {
     CollectionViewControllerTest::SetUp();
     is_signed_in_ = true;
   }
 
-  CollectionViewController* NewController() override NS_RETURNS_RETAINED {
-    delegate_.reset([[ImportDataControllerTestDelegate alloc] init]);
+  CollectionViewController* InstantiateController() override {
+    delegate_ = [[ImportDataControllerTestDelegate alloc] init];
     return [[ImportDataCollectionViewController alloc]
         initWithDelegate:delegate_
                fromEmail:@"fromEmail@gmail.com"
                  toEmail:@"toEmail@gmail.com"
               isSignedIn:is_signed_in_];
   }
 
   void set_is_signed_in(bool is_signed_in) { is_signed_in_ = is_signed_in; }
 
   bool is_signed_in_;
-  base::scoped_nsobject<ImportDataControllerTestDelegate> delegate_;
+  ImportDataControllerTestDelegate* delegate_;
 };
 
 TEST_F(ImportDataCollectionViewControllerTest, TestModelSignedIn) {
   CreateController();
   CheckController();
   ASSERT_EQ(2, NumberOfSections());
   EXPECT_EQ(1, NumberOfItemsInSection(0));
   CardMultilineItem* item = GetCollectionViewItem(0, 0);
   EXPECT_NSEQ(
       l10n_util::GetNSStringF(IDS_IOS_OPTIONS_IMPORT_DATA_HEADER,
@@ skipping 72 matching lines @@
 
 // Tests that the default choice when the user is signed in is Clear Data and
 // that tapping continue will correctly select it. Regression test for
 // crbug.com/649533
 TEST_F(ImportDataCollectionViewControllerTest, TestDefaultChoiceSignedIn) {
   CreateController();
 
   EXPECT_FALSE(delegate().didChooseClearDataPolicyCalled);
   UIBarButtonItem* item = controller().navigationItem.rightBarButtonItem;
   ASSERT_TRUE(item);
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Warc-performSelector-leaks"
   [item.target performSelector:item.action];
+#pragma clang diagnostic pop
 
   EXPECT_TRUE(delegate().didChooseClearDataPolicyCalled);
   EXPECT_EQ(SHOULD_CLEAR_DATA_CLEAR_DATA, delegate().shouldClearData);
 }
 
 // Tests that the default choice when the user is signed out is Merge Data and
 // that tapping continue will correctly select it. Regression test for
 // crbug.com/649533
 TEST_F(ImportDataCollectionViewControllerTest, TestDefaultChoiceSignedOut) {
   set_is_signed_in(false);
   CreateController();
 
   EXPECT_FALSE(delegate().didChooseClearDataPolicyCalled);
   UIBarButtonItem* item = controller().navigationItem.rightBarButtonItem;
   ASSERT_TRUE(item);
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Warc-performSelector-leaks"
   [item.target performSelector:item.action];
+#pragma clang diagnostic pop
 
   EXPECT_TRUE(delegate().didChooseClearDataPolicyCalled);
   EXPECT_EQ(SHOULD_CLEAR_DATA_MERGE_DATA, delegate().shouldClearData);
 }
 
 }  // namespace