Replace OwnPtr with WTF::Optional for optional recorders.

Source/core/paint/FileUploadControlPainter.cpp

 // 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.
 
 #include "config.h"
 #include "core/paint/FileUploadControlPainter.h"
 
 #include "core/layout/LayoutButton.h"
 #include "core/layout/LayoutFileUploadControl.h"
 #include "core/layout/TextRunConstructor.h"
 #include "core/paint/LayoutObjectDrawingRecorder.h"
 #include "core/paint/PaintInfo.h"
 #include "platform/graphics/paint/ClipRecorder.h"
+#include "wtf/Optional.h"
 
 namespace blink {
 
 const int buttonShadowHeight = 2;
 
 void FileUploadControlPainter::paintObject(const PaintInfo& paintInfo, const LayoutPoint& paintOffset)
 {
     if (m_layoutFileUploadControl.style()->visibility() != VISIBLE)
         return;
 
     // Push a clip.
-    OwnPtr<ClipRecorder> clipRecorder;
+    Optional<ClipRecorder> clipRecorder;
     if (paintInfo.phase == PaintPhaseForeground || paintInfo.phase == PaintPhaseChildBlockBackgrounds) {
         IntRect clipRect = enclosingIntRect(LayoutRect(
             LayoutPoint(paintOffset.x() + m_layoutFileUploadControl.borderLeft(), paintOffset.y() + m_layoutFileUploadControl.borderTop()),
             m_layoutFileUploadControl.size() + LayoutSize(0, -m_layoutFileUploadControl.borderWidth() + buttonShadowHeight)));
         if (clipRect.isEmpty())
             return;
-        clipRecorder = adoptPtr(new ClipRecorder(*paintInfo.context, m_layoutFileUploadControl, DisplayItem::ClipFileUploadControlRect, LayoutRect(clipRect)));
+        clipRecorder.emplace(*paintInfo.context, m_layoutFileUploadControl, DisplayItem::ClipFileUploadControlRect, LayoutRect(clipRect));
     }
 
     if (paintInfo.phase == PaintPhaseForeground) {
         const String& displayedFilename = m_layoutFileUploadControl.fileTextValue();
         const Font& font = m_layoutFileUploadControl.style()->font();
         TextRun textRun = constructTextRun(&m_layoutFileUploadControl, font, displayedFilename, m_layoutFileUploadControl.styleRef(), RespectDirection | RespectDirectionOverride);
         textRun.setExpansionBehavior(TextRun::AllowTrailingExpansion);
 
         // Determine where the filename should be placed
         LayoutUnit contentLeft = paintOffset.x() + m_layoutFileUploadControl.borderLeft() + m_layoutFileUploadControl.paddingLeft();
@@ skipping 28 matching lines @@
             paintInfo.context->setFillColor(m_layoutFileUploadControl.resolveColor(CSSPropertyColor));
             paintInfo.context->drawBidiText(font, textRunPaintInfo, FloatPoint(roundToInt(textX), roundToInt(textY)));
         }
     }
 
     // Paint the children.
     m_layoutFileUploadControl.LayoutBlockFlow::paintObject(paintInfo, paintOffset);
 }
 
 } // namespace blink