Revert "Remove OwnPtr from Blink."

third_party/WebKit/public/platform/WebTaskRunner.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 WebTaskRunner_h
 #define WebTaskRunner_h
 
 #include "WebCommon.h"
 
 #ifdef INSIDE_BLINK
 #include "wtf/Functional.h"
-#include "wtf/PtrUtil.h"
-#include <memory>
 #endif
 
 namespace blink {
 
 class WebTraceLocation;
 
 // The blink representation of a chromium SingleThreadTaskRunner.
 class BLINK_PLATFORM_EXPORT WebTaskRunner {
 public:
     virtual ~WebTaskRunner() {}
@@ skipping 37 matching lines @@
     // Helpers for posting bound functions as tasks.
 
     // For cross-thread posting. Can be called from any thread.
     void postTask(const WebTraceLocation&, std::unique_ptr<CrossThreadClosure>);
     void postDelayedTask(const WebTraceLocation&, std::unique_ptr<CrossThreadClosure>, long long delayMs);
 
     // For same-thread posting. Must be called from the associated WebThread.
     void postTask(const WebTraceLocation&, std::unique_ptr<SameThreadClosure>);
     void postDelayedTask(const WebTraceLocation&, std::unique_ptr<SameThreadClosure>, long long delayMs);
 
-    std::unique_ptr<WebTaskRunner> adoptClone()
+    PassOwnPtr<WebTaskRunner> adoptClone()
     {
-        return wrapUnique(clone());
+        return adoptPtr(clone());
     }
 #endif
 };
 
 } // namespace blink
 
 #endif // WebTaskRunner_h