Revert "Remove OwnPtr from Blink."

third_party/WebKit/Source/modules/fetch/FetchDataConsumerHandle.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 FetchDataConsumerHandle_h
 #define FetchDataConsumerHandle_h
 
 #include "modules/ModulesExport.h"
 #include "platform/blob/BlobData.h"
 #include "platform/network/EncodedFormData.h"
 #include "public/platform/WebDataConsumerHandle.h"
 #include "wtf/Forward.h"
 #include "wtf/PassRefPtr.h"
-#include "wtf/PtrUtil.h"
-#include <memory>
 
 namespace blink {
 
 // This is an interface class that adds Reader's blobDataHandle() to
 // WebDataConsumerHandle.
 // This class works not very well with Oilpan: As this class is not garbage
 // collected while many clients or related objects may be, it is very easy
 // to create a reference cycle. When an client is garbage collected, making
 // the client own the handle is the right way.
 class MODULES_EXPORT FetchDataConsumerHandle : public WebDataConsumerHandle {
@@ skipping 33 matching lines @@
 
         // Drains the data as an EncodedFormData.
         // This function returns a non-null form data when the handle is made
         // from an EncodedFormData-convertible value.
         virtual PassRefPtr<EncodedFormData> drainAsFormData() { return nullptr; }
     };
 
     // TODO(yhirano): obtainReader() is currently non-virtual override, and
     // will be changed into virtual override when we can use unique_ptr in
     // Blink.
-    std::unique_ptr<Reader> obtainReader(Client* client) { return wrapUnique(obtainReaderInternal(client)); }
+    PassOwnPtr<Reader> obtainReader(Client* client) { return adoptPtr(obtainReaderInternal(client)); }
 
 private:
     Reader* obtainReaderInternal(Client*) override = 0;
 };
 
 } // namespace blink
 
 #endif // FetchDataConsumerHandle_h