Revert "Remove OwnPtr from Blink."

third_party/WebKit/Source/core/offscreencanvas/OffscreenCanvas.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 OffscreenCanvas_h
 #define OffscreenCanvas_h
 
 #include "bindings/core/v8/ScriptPromise.h"
 #include "bindings/core/v8/ScriptState.h"
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "core/html/HTMLCanvasElement.h"
 #include "platform/geometry/IntSize.h"
 #include "platform/heap/Handle.h"
-#include <memory>
 
 namespace blink {
 
 class CanvasContextCreationAttributes;
 class ImageBitmap;
 class OffscreenCanvasRenderingContext2DOrWebGLRenderingContextOrWebGL2RenderingContext;
 typedef OffscreenCanvasRenderingContext2DOrWebGLRenderingContextOrWebGL2RenderingContext OffscreenRenderingContext;
 
 class CORE_EXPORT OffscreenCanvas final : public GarbageCollected<OffscreenCanvas>, public ScriptWrappable {
     DEFINE_WRAPPERTYPEINFO();
@@ skipping 10 matching lines @@
     ImageBitmap* transferToImageBitmap(ExceptionState&);
 
     IntSize size() const { return m_size; }
     void setAssociatedCanvasId(int canvasId) { m_canvasId = canvasId; }
     int getAssociatedCanvasId() const { return m_canvasId; }
     bool isNeutered() const { return m_isNeutered; }
     void setNeutered();
     CanvasRenderingContext* getCanvasRenderingContext(ScriptState*, const String&, const CanvasContextCreationAttributes&);
     CanvasRenderingContext* renderingContext() { return m_context; }
 
-    static void registerRenderingContextFactory(std::unique_ptr<CanvasRenderingContextFactory>);
+    static void registerRenderingContextFactory(PassOwnPtr<CanvasRenderingContextFactory>);
 
     bool originClean() const;
     void setOriginTainted() { m_originClean = false; }
 
     DECLARE_VIRTUAL_TRACE();
 
 private:
     explicit OffscreenCanvas(const IntSize&);
 
-    using ContextFactoryVector = Vector<std::unique_ptr<CanvasRenderingContextFactory>>;
+    using ContextFactoryVector = Vector<OwnPtr<CanvasRenderingContextFactory>>;
     static ContextFactoryVector& renderingContextFactories();
     static CanvasRenderingContextFactory* getRenderingContextFactory(int);
 
     Member<CanvasRenderingContext> m_context;
     int m_canvasId = -1; // DOMNodeIds starts from 0, using -1 to indicate no associated canvas element.
     IntSize m_size;
     bool m_isNeutered = false;
 
     bool m_originClean;
 };
 
 } // namespace blink
 
 #endif // OffscreenCanvas_h