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

Source/core/paint/SVGRootPainter.cpp

Index: Source/core/paint/SVGRootPainter.cpp
diff --git a/Source/core/paint/SVGRootPainter.cpp b/Source/core/paint/SVGRootPainter.cpp
index 34a7b980e47f74685d419af170bd3ee62f563827..b58b79beb4f0bdc0bfd877a9d5f3d3bc4b349591 100644
--- a/Source/core/paint/SVGRootPainter.cpp
+++ b/Source/core/paint/SVGRootPainter.cpp
@@ -44,9 +44,9 @@ void SVGRootPainter::paint(const PaintInfo& paintInfo, const LayoutPoint& paintO
     PaintInfo paintInfoBeforeFiltering(paintInfo);
 
     // Apply initial viewport clip.
-    OwnPtr<ClipRecorder> clipRecorder;
+    ClipRecorder clipRecorder(*paintInfoBeforeFiltering.context, m_layoutSVGRoot, paintInfoBeforeFiltering.displayItemTypeForClipping());
     if (m_layoutSVGRoot.shouldApplyViewportClip())
-        clipRecorder = adoptPtr(new ClipRecorder(*paintInfoBeforeFiltering.context, m_layoutSVGRoot, paintInfoBeforeFiltering.displayItemTypeForClipping(), LayoutRect(pixelSnappedIntRect(m_layoutSVGRoot.overflowClipRect(paintOffset)))));
+        clipRecorder.begin(LayoutRect(pixelSnappedIntRect(m_layoutSVGRoot.overflowClipRect(paintOffset))));
 
     // Convert from container offsets (html layoutObjects) to a relative transform (svg layoutObjects).
     // Transform from our paint container's coordinate system to our local coords.