Allow certain SP recorder classes to defer their "begin" operation.

Source/core/paint/SVGForeignObjectPainter.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/SVGForeignObjectPainter.h"
 
 #include "core/layout/svg/LayoutSVGForeignObject.h"
 #include "core/layout/svg/SVGLayoutSupport.h"
 #include "core/paint/BlockPainter.h"
 #include "core/paint/FloatClipRecorder.h"
 #include "core/paint/PaintInfo.h"
 #include "core/paint/SVGPaintContext.h"
 #include "core/paint/TransformRecorder.h"
 
 namespace blink {
 
 void SVGForeignObjectPainter::paint(const PaintInfo& paintInfo)
 {
     if (paintInfo.phase != PaintPhaseForeground && paintInfo.phase != PaintPhaseSelection)
         return;
 
     PaintInfo paintInfoBeforeFiltering(paintInfo);
     TransformRecorder transformRecorder(*paintInfoBeforeFiltering.context, m_layoutSVGForeignObject, m_layoutSVGForeignObject.localTransform());
 
     // When transitioning from SVG to block painters we need to keep the PaintInfo rect up-to-date
     // because it can be used for clipping.
     m_layoutSVGForeignObject.updatePaintInfoRect(paintInfoBeforeFiltering.rect);
 
-    OwnPtr<FloatClipRecorder> clipRecorder;
+    FloatClipRecorder clipRecorder(*paintInfoBeforeFiltering.context, m_layoutSVGForeignObject, paintInfoBeforeFiltering.phase);
     if (SVGLayoutSupport::isOverflowHidden(&m_layoutSVGForeignObject))
-        clipRecorder = adoptPtr(new FloatClipRecorder(*paintInfoBeforeFiltering.context, m_layoutSVGForeignObject, paintInfoBeforeFiltering.phase, m_layoutSVGForeignObject.viewportRect()));
+        clipRecorder.begin(m_layoutSVGForeignObject.viewportRect());
 
     SVGPaintContext paintContext(m_layoutSVGForeignObject, paintInfoBeforeFiltering);
     bool continueRendering = true;
     if (paintContext.paintInfo().phase == PaintPhaseForeground)
         continueRendering = paintContext.applyClipMaskAndFilterIfNecessary();
 
     if (continueRendering) {
         // Paint all phases of FO elements atomically as though the FO element established its own stacking context.
         bool preservePhase = paintContext.paintInfo().phase == PaintPhaseSelection || paintContext.paintInfo().phase == PaintPhaseTextClip;
         const LayoutPoint childPoint = IntPoint();
         paintContext.paintInfo().phase = preservePhase ? paintContext.paintInfo().phase : PaintPhaseBlockBackground;
         BlockPainter(m_layoutSVGForeignObject).paint(paintContext.paintInfo(), childPoint);
         if (!preservePhase) {
             paintContext.paintInfo().phase = PaintPhaseChildBlockBackgrounds;
             BlockPainter(m_layoutSVGForeignObject).paint(paintContext.paintInfo(), childPoint);
             paintContext.paintInfo().phase = PaintPhaseFloat;
             BlockPainter(m_layoutSVGForeignObject).paint(paintContext.paintInfo(), childPoint);
             paintContext.paintInfo().phase = PaintPhaseForeground;
             BlockPainter(m_layoutSVGForeignObject).paint(paintContext.paintInfo(), childPoint);
             paintContext.paintInfo().phase = PaintPhaseOutline;
             BlockPainter(m_layoutSVGForeignObject).paint(paintContext.paintInfo(), childPoint);
         }
     }
 }
 
 } // namespace blink