Return unique_ptr<WebDataConsumerHandle::Reader> directly from obtainReader

third_party/WebKit/Source/modules/fetch/FetchBlobDataConsumerHandle.h

 // 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.
 
 #ifndef FetchBlobDataConsumerHandle_h
 #define FetchBlobDataConsumerHandle_h
 
 #include "core/fetch/ResourceLoaderOptions.h"
 #include "core/loader/ThreadableLoader.h"
 #include "modules/ModulesExport.h"
@@ skipping 21 matching lines @@
 
     static std::unique_ptr<FetchDataConsumerHandle> create(ExecutionContext*, PassRefPtr<BlobDataHandle>);
 
     // For testing.
     static std::unique_ptr<FetchDataConsumerHandle> create(ExecutionContext*, PassRefPtr<BlobDataHandle>, LoaderFactory*);
 
     ~FetchBlobDataConsumerHandle();
 
 private:
     FetchBlobDataConsumerHandle(ExecutionContext*, PassRefPtr<BlobDataHandle>, LoaderFactory*);
-    Reader* obtainReaderInternal(Client*) override;
+    std::unique_ptr<Reader> obtainFetchDataReader(Client*) override;
 
     const char* debugName() const override { return "FetchBlobDataConsumerHandle"; }
 
     class ReaderContext;
     RefPtr<ReaderContext> m_readerContext;
 };
 
 } // namespace blink
 
 #endif // FetchBlobDataConsumerHandle_h