Replace OwnPtr with WTF::Optional for optional recorders.

Source/core/paint/ReplacedPainter.cpp

Index: Source/core/paint/ReplacedPainter.cpp
diff --git a/Source/core/paint/ReplacedPainter.cpp b/Source/core/paint/ReplacedPainter.cpp
index 4e01e46b9e8ba5f6bf061b2194494cb8382049fb..13a7bdde4ca6c8a478ba3cbbb87476cde17fca15 100644
--- a/Source/core/paint/ReplacedPainter.cpp
+++ b/Source/core/paint/ReplacedPainter.cpp
@@ -12,6 +12,7 @@
 #include "core/paint/ObjectPainter.h"
 #include "core/paint/PaintInfo.h"
 #include "core/paint/RoundedInnerRectClipper.h"
+#include "wtf/Optional.h"
 
 namespace blink {
 
@@ -56,7 +57,7 @@ void ReplacedPainter::paint(const PaintInfo& paintInfo, const LayoutPoint& paint
             return;
 
     {
-        OwnPtr<RoundedInnerRectClipper> clipper;
+        Optional<RoundedInnerRectClipper> clipper;
         bool completelyClippedOut = false;
         if (m_layoutReplaced.style()->hasBorderRadius()) {
             LayoutRect borderRect = LayoutRect(adjustedPaintOffset, m_layoutReplaced.size());
@@ -73,7 +74,7 @@ void ReplacedPainter::paint(const PaintInfo& paintInfo, const LayoutPoint& paint
                         -(m_layoutReplaced.paddingLeft() + m_layoutReplaced.borderLeft())),
                     true, true);
 
-                clipper = adoptPtr(new RoundedInnerRectClipper(m_layoutReplaced, paintInfo, paintRect, roundedInnerRect, ApplyToDisplayListIfEnabled));
+                clipper.emplace(m_layoutReplaced, paintInfo, paintRect, roundedInnerRect, ApplyToDisplayListIfEnabled);
             }
         }