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

ios/chrome/browser/ui/ntp/google_landing_controller_unittest.mm

 // Copyright 2013 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.
 
 #include <memory>
 
-#include "base/mac/scoped_nsobject.h"
 #include "base/memory/ptr_util.h"
 #include "base/message_loop/message_loop.h"
 #include "components/search_engines/template_url_service.h"
 #include "ios/chrome/browser/browser_state/test_chrome_browser_state.h"
 #include "ios/chrome/browser/search_engines/template_url_service_factory.h"
 #include "ios/chrome/browser/sessions/ios_chrome_tab_restore_service_factory.h"
 #import "ios/chrome/browser/ui/ntp/google_landing_controller.h"
 #include "ios/chrome/test/block_cleanup_test.h"
 #include "ios/chrome/test/ios_chrome_scoped_testing_local_state.h"
 #include "ios/web/public/test/test_web_thread.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/gtest_mac.h"
 #import "third_party/ocmock/OCMock/OCMock.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 namespace {
 
 class GoogleLandingControllerTest : public BlockCleanupTest {
  public:
   GoogleLandingControllerTest()
       : ui_thread_(web::WebThread::UI, &message_loop_),
         io_thread_(web::WebThread::IO, &message_loop_) {}
 
  protected:
   void SetUp() override {
@@ skipping 10 matching lines @@
     chrome_browser_state_ = test_cbs_builder.Build();
     BlockCleanupTest::SetUp();
 
     // Set up tab restore service.
     TemplateURLService* template_url_service =
         ios::TemplateURLServiceFactory::GetForBrowserState(
             chrome_browser_state_.get());
     template_url_service->Load();
 
     // Set up stub UrlLoader.
-    mockUrlLoader_.reset(
-        [[OCMockObject mockForProtocol:@protocol(UrlLoader)] retain]);
-    controller_.reset([[GoogleLandingController alloc]
-            initWithLoader:(id<UrlLoader>)mockUrlLoader_.get()
+    mockUrlLoader_ = [OCMockObject mockForProtocol:@protocol(UrlLoader)];
+    controller_ = [[GoogleLandingController alloc]
+            initWithLoader:(id<UrlLoader>)mockUrlLoader_
               browserState:chrome_browser_state_.get()
                    focuser:nil
         webToolbarDelegate:nil
-                  tabModel:nil]);
+                  tabModel:nil];
   };
 
   base::MessageLoopForUI message_loop_;
   web::TestWebThread ui_thread_;
   web::TestWebThread io_thread_;
   IOSChromeScopedTestingLocalState local_state_;
   std::unique_ptr<TestChromeBrowserState> chrome_browser_state_;
-  base::scoped_nsobject<OCMockObject> mockUrlLoader_;
-  base::scoped_nsobject<GoogleLandingController> controller_;
+  OCMockObject* mockUrlLoader_;
+  GoogleLandingController* controller_;
 };
 
 TEST_F(GoogleLandingControllerTest, TestConstructorDestructor) {
-  EXPECT_TRUE(controller_.get());
+  EXPECT_TRUE(controller_);
 }
 
 }  // anonymous namespace