Use refs for GraphicsContext

third_party/WebKit/Source/platform/graphics/GeneratedImage.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 26 matching lines @@
 #include "third_party/skia/include/core/SkPicture.h"
 
 namespace blink {
 
 void GeneratedImage::computeIntrinsicDimensions(Length& intrinsicWidth, Length& intrinsicHeight, FloatSize& intrinsicRatio)
 {
     Image::computeIntrinsicDimensions(intrinsicWidth, intrinsicHeight, intrinsicRatio);
     intrinsicRatio = FloatSize();
 }
 
-void GeneratedImage::drawPattern(GraphicsContext* destContext, const FloatRect& srcRect, const FloatSize& scale,
+void GeneratedImage::drawPattern(GraphicsContext& destContext, const FloatRect& srcRect, const FloatSize& scale,
     const FloatPoint& phase, SkXfermode::Mode compositeOp, const FloatRect& destRect,
     const FloatSize& repeatSpacing)
 {
     FloatRect tileRect = srcRect;
     tileRect.expand(FloatSize(repeatSpacing));
 
-    SkPictureBuilder builder(tileRect, nullptr, destContext);
+    SkPictureBuilder builder(tileRect, nullptr, &destContext);
     builder.context().beginRecording(tileRect);
-    drawTile(&builder.context(), srcRect);
+    drawTile(builder.context(), srcRect);
     RefPtr<const SkPicture> tilePicture = builder.endRecording();
 
     AffineTransform patternTransform;
     patternTransform.translate(phase.x(), phase.y());
     patternTransform.scale(scale.width(), scale.height());
     patternTransform.translate(tileRect.x(), tileRect.y());
 
     RefPtr<Pattern> picturePattern = Pattern::createPicturePattern(tilePicture);
     picturePattern->setPatternSpaceTransform(patternTransform);
 
-    SkPaint fillPaint = destContext->fillPaint();
+    SkPaint fillPaint = destContext.fillPaint();
     picturePattern->applyToPaint(fillPaint);
     fillPaint.setColor(SK_ColorBLACK);
     fillPaint.setXfermodeMode(compositeOp);
 
-    destContext->drawRect(destRect, fillPaint);
+    destContext.drawRect(destRect, fillPaint);
 }
 
 PassRefPtr<SkImage> GeneratedImage::imageForCurrentFrame()
 {
     return nullptr;
 }
 
 } // namespace blink