Use unique_ptr for Platform::CreateURLLoader

third_party/WebKit/Source/platform/loader/testing/FetchTestingPlatformSupport.cpp

 // Copyright 2017 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 "platform/loader/testing/FetchTestingPlatformSupport.h"
 
 #include <memory>
 #include "platform/loader/fetch/ResourceError.h"
 #include "platform/loader/testing/MockFetchContext.h"
 #include "platform/testing/weburl_loader_mock_factory_impl.h"
@@ skipping 27 matching lines @@
     const WebURL& url) const {
   return ResourceError(kErrorDomainBlinkInternal, -1, url.GetString(),
                        "cancelledError for testing");
 }
 
 WebURLLoaderMockFactory*
 FetchTestingPlatformSupport::GetURLLoaderMockFactory() {
   return url_loader_mock_factory_.get();
 }
 
-WebURLLoader* FetchTestingPlatformSupport::CreateURLLoader() {
+std::unique_ptr<WebURLLoader> FetchTestingPlatformSupport::CreateURLLoader() {
   return url_loader_mock_factory_->CreateURLLoader(nullptr);
 }
 
 }  // namespace blink