Replace OwnPtr with WTF::Optional for optional recorders.

Source/core/svg/graphics/SVGImage.cpp

 /*
  * Copyright (C) 2006 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008, 2009 Apple Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
@@ skipping 41 matching lines @@
 #include "platform/TraceEvent.h"
 #include "platform/geometry/IntRect.h"
 #include "platform/graphics/GraphicsContext.h"
 #include "platform/graphics/ImageBuffer.h"
 #include "platform/graphics/ImageObserver.h"
 #include "platform/graphics/paint/ClipRecorder.h"
 #include "platform/graphics/paint/DisplayItemListContextRecorder.h"
 #include "platform/graphics/paint/DrawingRecorder.h"
 #include "platform/graphics/paint/SkPictureBuilder.h"
 #include "third_party/skia/include/core/SkPicture.h"
+#include "wtf/Optional.h"
 #include "wtf/PassRefPtr.h"
 
 namespace blink {
 
 SVGImage::SVGImage(ImageObserver* observer)
     : Image(observer)
 {
 }
 
 SVGImage::~SVGImage()
@@ skipping 211 matching lines @@
     // there may have been a previous url/fragment that needs to be reset.
     view->scrollToFragment(m_url);
 
     {
         DisplayItemListContextRecorder contextRecorder(*context);
         GraphicsContext& paintContext = contextRecorder.context();
 
         ClipRecorder clipRecorder(paintContext, *this, DisplayItem::ClipNodeImage, LayoutRect(enclosingIntRect(dstRect)));
 
         bool hasCompositing = compositeOp != SkXfermode::kSrcOver_Mode;
-        OwnPtr<CompositingRecorder> compositingRecorder;
+        Optional<CompositingRecorder> compositingRecorder;
         if (hasCompositing || opacity < 1)
-            compositingRecorder = adoptPtr(new CompositingRecorder(paintContext, *this, compositeOp, opacity));
+            compositingRecorder.emplace(paintContext, *this, compositeOp, opacity);
 
         // We can only draw the entire frame, clipped to the rect we want. So compute where the top left
         // of the image would be if we were drawing without clipping, and translate accordingly.
         FloatSize scale(dstRect.width() / srcRect.width(), dstRect.height() / srcRect.height());
         FloatSize topLeftOffset(srcRect.location().x() * scale.width(), srcRect.location().y() * scale.height());
         FloatPoint destOffset = dstRect.location() - topLeftOffset;
         AffineTransform transform = AffineTransform::translation(destOffset.x(), destOffset.y());
         transform.scale(scale.width(), scale.height());
         TransformRecorder transformRecorder(paintContext, *this, transform);
 
@@ skipping 161 matching lines @@
 
     return m_page;
 }
 
 String SVGImage::filenameExtension() const
 {
     return "svg";
 }
 
 }