Use refs for GraphicsContext

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

 /*
  * Copyright (C) 2004, 2005, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Rob Buis <buis@kde.org>
  * Copyright (C) Research In Motion Limited 2009-2010. All rights reserved.
  * Copyright (C) 2011 Dirk Schulze <krit@webkit.org>
  *
  * 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.
@@ skipping 142 matching lines @@
         transform.scaleNonUniform(referenceBox.width(), referenceBox.height());
         clipPath.transform(transform);
     }
 
     // Transform path by animatedLocalTransform.
     clipPath.transform(animatedLocalTransform);
     return true;
 }
 
 PassRefPtr<const SkPicture> LayoutSVGResourceClipper::createContentPicture(AffineTransform& contentTransformation, const FloatRect& targetBoundingBox,
-    GraphicsContext* context)
+    GraphicsContext& context)
 {
     ASSERT(frame());
 
     if (clipPathUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX) {
         contentTransformation.translate(targetBoundingBox.x(), targetBoundingBox.y());
         contentTransformation.scaleNonUniform(targetBoundingBox.width(), targetBoundingBox.height());
     }
 
     if (m_clipContentPicture)
         return m_clipContentPicture;
 
     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);
 
     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;
 
@@ skipping 13 matching lines @@
             continue;
 
         if (isUseElement)
             layoutObject = childElement->layoutObject();
 
         // Switch to a paint behavior where all children of this <clipPath> will be laid out using special constraints:
         // - fill-opacity/stroke-opacity/opacity set to 1
         // - masker/filter not applied when laying out the children
         // - fill is set to the initial fill paint server (solid, black)
         // - stroke is set to the initial stroke paint server (none)
-        PaintInfo info(&pictureBuilder.context(), LayoutRect::infiniteIntRect(), PaintPhaseForeground, GlobalPaintNormalPhase, PaintLayerPaintingRenderingClipPathAsMask);
+        PaintInfo info(pictureBuilder.context(), LayoutRect::infiniteIntRect(), PaintPhaseForeground, GlobalPaintNormalPhase, PaintLayerPaintingRenderingClipPathAsMask);
         layoutObject->paint(info, IntPoint());
     }
 
     m_clipContentPicture = pictureBuilder.endRecording();
     return m_clipContentPicture;
 }
 
 void LayoutSVGResourceClipper::calculateClipContentPaintInvalidationRect()
 {
     // This is a rough heuristic to appraise the clip size and doesn't consider clip on clip.
@@ skipping 59 matching lines @@
         AffineTransform transform;
         transform.translate(objectBoundingBox.x(), objectBoundingBox.y());
         transform.scaleNonUniform(objectBoundingBox.width(), objectBoundingBox.height());
         return transform.mapRect(m_clipBoundaries);
     }
 
     return m_clipBoundaries;
 }
 
 }