Use unique_ptr for Platform::CreateURLLoader

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

 // 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.
 
 #ifndef FetchTestingPlatformSupport_h
 #define FetchTestingPlatformSupport_h
 
 #include <memory>
 #include "platform/heap/Persistent.h"
 #include "platform/testing/TestingPlatformSupport.h"
 
 namespace blink {
 
 class MockFetchContext;
 
 class FetchTestingPlatformSupport
     : public TestingPlatformSupportWithMockScheduler {
  public:
   FetchTestingPlatformSupport();
   ~FetchTestingPlatformSupport() override;
 
   MockFetchContext* Context();
 
   // Platform:
   WebURLError CancelledError(const WebURL&) const override;
   WebURLLoaderMockFactory* GetURLLoaderMockFactory() override;
-  WebURLLoader* CreateURLLoader() override;
+  std::unique_ptr<WebURLLoader> CreateURLLoader() override;
 
  private:
   class FetchTestingWebURLLoaderMockFactory;
 
   Persistent<MockFetchContext> context_;
   std::unique_ptr<WebURLLoaderMockFactory> url_loader_mock_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(FetchTestingPlatformSupport);
 };
 
 }  // namespace blink
 
 #endif