Oilpan: move SVG property hierarchy to the heap.

Source/core/paint/FilterPainter.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/FilterPainter.h"
 
 #include "core/paint/LayerPainter.h"
 #include "core/rendering/FilterEffectRenderer.h"
 #include "core/rendering/RenderLayer.h"
 #include "platform/graphics/GraphicsContext.h"
 #include "platform/graphics/filters/FilterEffect.h"
 #include "platform/graphics/filters/SkiaImageFilterBuilder.h"
 
 namespace blink {
 
 FilterPainter::FilterPainter(RenderLayer& renderLayer, GraphicsContext* context, const FloatRect& filterBoxRect, const ClipRect& clipRect, const LayerPaintingInfo& paintingInfo, PaintLayerFlags paintFlags)
     : m_filterInProgress(false)
     , m_context(context)
 {
     SkiaImageFilterBuilder builder(context);
-    RefPtr<FilterEffect> lastEffect = renderLayer.filterRenderer()->lastEffect();
+    RefPtrWillBeRawPtr<FilterEffect> lastEffect = renderLayer.filterRenderer()->lastEffect();
     lastEffect->determineFilterPrimitiveSubregion(MapRectForward);
     RefPtr<ImageFilter> imageFilter = builder.build(lastEffect.get(), ColorSpaceDeviceRGB);
     if (!imageFilter)
         return;
 
     if (clipRect.rect() != paintingInfo.paintDirtyRect || clipRect.hasRadius()) {
         m_clipRecorder = adoptPtr(new ClipRecorder(&renderLayer, context, DisplayItem::ClipLayerFilter, clipRect));
         if (clipRect.hasRadius())
             LayerPainter::applyRoundedRectClips(renderLayer, paintingInfo, context, paintFlags, *m_clipRecorder);
     }
 
     context->save();
     FloatRect boundaries = mapImageFilterRect(imageFilter.get(), filterBoxRect);
     context->translate(filterBoxRect.x(), filterBoxRect.y());
     boundaries.move(-filterBoxRect.x(), -filterBoxRect.y());
     context->beginLayer(1, CompositeSourceOver, &boundaries, ColorFilterNone, imageFilter.get());
     context->translate(-filterBoxRect.x(), -filterBoxRect.y());
     m_filterInProgress = true;
 }
 
 FilterPainter::~FilterPainter()
 {
     if (m_filterInProgress) {
         m_context->endLayer();
         m_context->restore();
     }
 }
 
 } // namespace blink