Use refs for GraphicsContext

third_party/WebKit/Source/core/svg/graphics/SVGImage.cpp

 /*
  * Copyright (C) 2006 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008, 2009 Apple Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
@@ skipping 200 matching lines @@
     scaledSrc.setSize(adjustedSrcSize);
 
     drawInternal(canvas, paint, dstRect, scaledSrc, DoNotRespectImageOrientation, ClampImageToSourceRect, url);
 }
 
 PassRefPtr<SkImage> SVGImage::imageForCurrentFrame()
 {
     return imageForCurrentFrameForContainer(KURL());
 }
 
-void SVGImage::drawPatternForContainer(GraphicsContext* context, const FloatSize containerSize,
+void SVGImage::drawPatternForContainer(GraphicsContext& context, const FloatSize containerSize,
     float zoom, const FloatRect& srcRect, const FloatSize& tileScale, const FloatPoint& phase,
     SkXfermode::Mode compositeOp, const FloatRect& dstRect,
     const FloatSize& repeatSpacing, const KURL& url)
 {
     // Tile adjusted for scaling/stretch.
     FloatRect tile(srcRect);
     tile.scale(tileScale.width(), tileScale.height());
 
     // Expand the tile to account for repeat spacing.
     FloatRect spacedTile(tile);
     spacedTile.expand(FloatSize(repeatSpacing));
 
-    SkPictureBuilder patternPicture(spacedTile, nullptr, context);
+    SkPictureBuilder patternPicture(spacedTile, nullptr, &context);
     if (!DrawingRecorder::useCachedDrawingIfPossible(patternPicture.context(), *this, DisplayItem::Type::SVGImage)) {
         DrawingRecorder patternPictureRecorder(patternPicture.context(), *this, DisplayItem::Type::SVGImage, spacedTile);
         // When generating an expanded tile, make sure we don't draw into the spacing area.
         if (tile != spacedTile)
             patternPicture.context().clip(tile);
         SkPaint paint;
         drawForContainer(patternPicture.context().canvas(), paint, containerSize, zoom, tile, srcRect, url);
     }
     RefPtr<const SkPicture> tilePicture = patternPicture.endRecording();
 
     SkMatrix patternTransform;
     patternTransform.setTranslate(phase.x() + spacedTile.x(), phase.y() + spacedTile.y());
     RefPtr<SkShader> patternShader = adoptRef(SkShader::CreatePictureShader(
         tilePicture.get(), SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode,
         &patternTransform, nullptr));
 
     SkPaint paint;
     paint.setShader(patternShader.get());
     paint.setXfermodeMode(compositeOp);
-    paint.setColorFilter(context->colorFilter());
-    context->drawRect(dstRect, paint);
+    paint.setColorFilter(context.colorFilter());
+    context.drawRect(dstRect, paint);
 }
 
 PassRefPtr<SkImage> SVGImage::imageForCurrentFrameForContainer(const KURL& url)
 {
     if (!m_page)
         return nullptr;
 
     SkPictureRecorder recorder;
     SkCanvas* canvas = recorder.beginRecording(width(), height());
     drawForContainer(canvas, SkPaint(), FloatSize(size()), 1, rect(), rect(), url);
@@ skipping 243 matching lines @@
 
     return m_page;
 }
 
 String SVGImage::filenameExtension() const
 {
     return "svg";
 }
 
 }