SigninStatusMetricsProvider factory returns a std::unique_ptr<>.

chrome/browser/signin/chrome_signin_status_metrics_provider_delegate_unittest.cc

 // Copyright 2014 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 "chrome/browser/signin/chrome_signin_status_metrics_provider_delegate.h"
 
 #include <utility>
 
 #include "build/build_config.h"
 #include "components/signin/core/browser/signin_status_metrics_provider.h"
 #include "content/public/test/test_browser_thread_bundle.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 #if !defined(OS_ANDROID)
 TEST(ChromeSigninStatusMetricsProviderDelegateTest,
      UpdateStatusWhenBrowserAdded) {
   content::TestBrowserThreadBundle thread_bundle;
 
   std::unique_ptr<ChromeSigninStatusMetricsProviderDelegate> delegate(
       new ChromeSigninStatusMetricsProviderDelegate);
   ChromeSigninStatusMetricsProviderDelegate* raw_delegate = delegate.get();
-  std::unique_ptr<SigninStatusMetricsProvider> metrics_provider(
-      SigninStatusMetricsProvider::CreateInstance(std::move(delegate)));
+  std::unique_ptr<SigninStatusMetricsProvider> metrics_provider =
+      SigninStatusMetricsProvider::CreateInstance(std::move(delegate));
 
   // Initial status is all signed in and then a signed-in browser is opened.
   metrics_provider->UpdateInitialSigninStatusForTesting(2, 2);
   raw_delegate->UpdateStatusWhenBrowserAdded(true);
   EXPECT_EQ(SigninStatusMetricsProviderBase::ALL_PROFILES_SIGNED_IN,
             metrics_provider->GetSigninStatusForTesting());
 
   // Initial status is all signed in and then a signed-out browser is opened.
   metrics_provider->UpdateInitialSigninStatusForTesting(2, 2);
   raw_delegate->UpdateStatusWhenBrowserAdded(false);
@@ skipping 18 matching lines @@
   EXPECT_EQ(SigninStatusMetricsProviderBase::MIXED_SIGNIN_STATUS,
             metrics_provider->GetSigninStatusForTesting());
 
   // Initial status is mixed and then a signed-out browser is opened.
   metrics_provider->UpdateInitialSigninStatusForTesting(2, 1);
   raw_delegate->UpdateStatusWhenBrowserAdded(false);
   EXPECT_EQ(SigninStatusMetricsProviderBase::MIXED_SIGNIN_STATUS,
             metrics_provider->GetSigninStatusForTesting());
 }
 #endif