Mac: Make ScopedTypeRef require explicit constructors

ios/chrome/browser/passwords/password_controller_unittest.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 "ios/chrome/browser/passwords/password_controller.h"
 
 #include <memory>
 #include <vector>
 
 #include "base/mac/scoped_nsobject.h"
@@ skipping 54 matching lines @@
       base::WrapUnique(new syncable_prefs::TestingPrefServiceSyncable);
   pref_service->registry()->RegisterBooleanPref(
       password_manager::prefs::kPasswordManagerSavingEnabled, true);
   builder.SetPrefService(std::move(pref_service));
   std::unique_ptr<TestChromeBrowserState> browser_state(builder.Build());
   MockWebState web_state;
   ON_CALL(web_state, GetBrowserState())
       .WillByDefault(testing::Return(browser_state.get()));
   auto client = base::WrapUnique(new MockPasswordManagerClient);
   MockPasswordManagerClient* weak_client = client.get();
-  base::scoped_nsobject<PasswordController> passwordController =
+  base::scoped_nsobject<PasswordController> passwordController(
       [[PasswordController alloc] initWithWebState:&web_state
                                passwordsUiDelegate:nil
-                                            client:std::move(client)];
+                                            client:std::move(client)]);
 
   // Use a mock LogManager to detect that OnPasswordFormsRendered has been
   // called. TODO(crbug.com/598672): this is a hack, we should modularize the
   // code better to allow proper unit-testing.
   MockLogManager log_manager;
   EXPECT_CALL(log_manager, IsLoggingActive()).WillRepeatedly(Return(true));
   EXPECT_CALL(log_manager,
               LogSavePasswordProgress(
                   "Message: \"PasswordManager::OnPasswordFormsRendered\"\n"));
   EXPECT_CALL(log_manager,
               LogSavePasswordProgress(testing::Ne(
                   "Message: \"PasswordManager::OnPasswordFormsRendered\"\n")))
       .Times(testing::AnyNumber());
   EXPECT_CALL(*weak_client, GetLogManager())
       .WillRepeatedly(Return(&log_manager));
 
   web_state.SetContentIsHTML(false);
   web_state.SetCurrentURL(GURL("https://example.com"));
   [passwordController webStateDidLoadPage:&web_state];
 }