Revert "Remove OwnPtr from Blink."

third_party/WebKit/public/platform/WebDataConsumerHandle.h

 // Copyright 2014 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 WebDataConsumerHandle_h
 #define WebDataConsumerHandle_h
 
 #include <stddef.h>
 
 #if INSIDE_BLINK
-#include <memory>
+#include "wtf/PassOwnPtr.h"
 #endif
 
 #include "public/platform/WebCommon.h"
 
 namespace blink {
 
 // WebDataConsumerHandle represents the "consumer" side of a data pipe. A user
 // can read data from it.
 //
 // A WebDataConsumerHandle is a thread-safe object. A user can call
@@ skipping 75 matching lines @@
     virtual ~WebDataConsumerHandle();
 
     // Returns a non-null reader. This function can be called only when this
     // handle is not locked. |client| can be null. Otherwise, |*client| must be
     // valid as long as the reader is valid. The returned reader is bound to
     // the calling thread and client notification will be called on the thread
     // if |client| is not null.
     // If |client| is not null and the handle is not waiting, client
     // notification is called asynchronously.
 #if INSIDE_BLINK
-    std::unique_ptr<Reader> obtainReader(Client*);
+    PassOwnPtr<Reader> obtainReader(Client*);
 #endif
 
     // Returns a string literal (e.g. class name) for debugging only.
     virtual const char* debugName() const = 0;
 
 private:
     // The caller takes ownership of the returned object.
     virtual Reader* obtainReaderInternal(Client*) = 0;
 };
 
 } // namespace blink
 
 #endif // WebDataConsumerHandle_h