Use refs for GraphicsContext

third_party/WebKit/Source/core/layout/svg/LayoutSVGResourceMasker.cpp

 /*
  * Copyright (C) Research In Motion Limited 2009-2010. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 35 matching lines @@
     markAllClientsForInvalidation(markForInvalidation ? LayoutAndBoundariesInvalidation : ParentOnlyInvalidation);
 }
 
 void LayoutSVGResourceMasker::removeClientFromCache(LayoutObject* client, bool markForInvalidation)
 {
     ASSERT(client);
     markClientForInvalidation(client, markForInvalidation ? BoundariesInvalidation : ParentOnlyInvalidation);
 }
 
 PassRefPtr<const SkPicture> LayoutSVGResourceMasker::createContentPicture(AffineTransform& contentTransformation, const FloatRect& targetBoundingBox,
-    GraphicsContext* context)
+    GraphicsContext& context)
 {
     SVGUnitTypes::SVGUnitType contentUnits = toSVGMaskElement(element())->maskContentUnits()->currentValue()->enumValue();
     if (contentUnits == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX) {
         contentTransformation.translate(targetBoundingBox.x(), targetBoundingBox.y());
         contentTransformation.scaleNonUniform(targetBoundingBox.width(), targetBoundingBox.height());
     }
 
     if (m_maskContentPicture)
         return m_maskContentPicture;
 
     SubtreeContentTransformScope contentTransformScope(contentTransformation);
 
     // Using strokeBoundingBox (instead of paintInvalidationRectInLocalCoordinates) to avoid the intersection
     // with local clips/mask, which may yield incorrect results when mixing objectBoundingBox and
     // userSpaceOnUse units (http://crbug.com/294900).
     FloatRect bounds = strokeBoundingBox();
 
-    SkPictureBuilder pictureBuilder(bounds, nullptr, context);
+    SkPictureBuilder pictureBuilder(bounds, nullptr, &context);
 
     ColorFilter maskContentFilter = style()->svgStyle().colorInterpolation() == CI_LINEARRGB
         ? ColorFilterSRGBToLinearRGB : ColorFilterNone;
     pictureBuilder.context().setColorFilter(maskContentFilter);
 
     for (SVGElement* childElement = Traversal<SVGElement>::firstChild(*element()); childElement; childElement = Traversal<SVGElement>::nextSibling(*childElement)) {
         LayoutObject* layoutObject = childElement->layoutObject();
         if (!layoutObject)
             continue;
         const ComputedStyle* style = layoutObject->style();
         if (!style || style->display() == NONE || style->visibility() != VISIBLE)
             continue;
 
-        SVGPaintContext::paintSubtree(&pictureBuilder.context(), layoutObject);
+        SVGPaintContext::paintSubtree(pictureBuilder.context(), layoutObject);
     }
 
     m_maskContentPicture = pictureBuilder.endRecording();
     return m_maskContentPicture;
 }
 
 void LayoutSVGResourceMasker::calculateMaskContentPaintInvalidationRect()
 {
     for (SVGElement* childElement = Traversal<SVGElement>::firstChild(*element()); childElement; childElement = Traversal<SVGElement>::nextSibling(*childElement)) {
         LayoutObject* layoutObject = childElement->layoutObject();
@@ skipping 27 matching lines @@
         transform.translate(objectBoundingBox.x(), objectBoundingBox.y());
         transform.scaleNonUniform(objectBoundingBox.width(), objectBoundingBox.height());
         maskRect = transform.mapRect(maskRect);
     }
 
     maskRect.intersect(maskBoundaries);
     return maskRect;
 }
 
 }