Convert //chrome/browser/extensions from scoped_ptr to std::unique_ptr

chrome/browser/extensions/background_xhr_browsertest.cc

 // 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.
 
+#include <memory>
+
 #include "base/bind.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/run_loop.h"
 #include "chrome/browser/extensions/extension_browsertest.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_io_data.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "content/public/browser/browser_thread.h"
 #include "extensions/common/extension.h"
 #include "extensions/test/result_catcher.h"
 #include "net/base/escape.h"
 #include "net/base/url_util.h"
 #include "net/ssl/client_cert_store.h"
 #include "net/ssl/ssl_server_config.h"
 #include "net/test/embedded_test_server/embedded_test_server.h"
 #include "url/gurl.h"
 
 namespace {
 
-scoped_ptr<net::ClientCertStore> CreateNullCertStore() {
+std::unique_ptr<net::ClientCertStore> CreateNullCertStore() {
   return nullptr;
 }
 
 void InstallNullCertStoreFactoryOnIOThread(
     content::ResourceContext* resource_context) {
   ProfileIOData::FromResourceContext(resource_context)
       ->set_client_cert_store_factory_for_testing(
           base::Bind(&CreateNullCertStore));
 }
 
@@ skipping 39 matching lines @@
   ASSERT_NO_FATAL_FAILURE(
       RunTest("test_tls_client_auth.html", https_server.GetURL("/")));
 }
 
 // Test that fetching a URL using HTTP auth doesn't crash, hang, or prompt.
 IN_PROC_BROWSER_TEST_F(BackgroundXhrTest, HttpAuth) {
   ASSERT_TRUE(embedded_test_server()->Start());
   ASSERT_NO_FATAL_FAILURE(RunTest(
       "test_http_auth.html", embedded_test_server()->GetURL("/auth-basic")));
 }