Removing the dependency on GraphicsContext for drawing images in 2D canvas

Source/platform/graphics/GradientGeneratedImage.cpp

 /*
  * Copyright (C) 2008, 2009, 2010, 2012 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 13 matching lines @@
  */
 
 #include "config.h"
 #include "platform/graphics/GradientGeneratedImage.h"
 
 #include "platform/geometry/FloatRect.h"
 #include "platform/graphics/GraphicsContextStateSaver.h"
 
 namespace blink {
 
-void GradientGeneratedImage::draw(GraphicsContext* destContext, const FloatRect& destRect, const FloatRect& srcRect, SkXfermode::Mode compositeOp, RespectImageOrientationEnum)
+void GradientGeneratedImage::draw(SkCanvas* canvas, const SkPaint& paint, const FloatRect& destRect, const FloatRect& srcRect, RespectImageOrientationEnum, const ImageFilterQualityHelper*)
 {
-    GraphicsContextStateSaver stateSaver(*destContext);
-    destContext->clip(destRect);
-    destContext->translate(destRect.x(), destRect.y());
+    SkAutoCanvasRestore ar(canvas, true);
+    canvas->clipRect(destRect);
+    canvas->translate(destRect.x(), destRect.y());
     if (destRect.size() != srcRect.size())
-        destContext->scale(destRect.width() / srcRect.width(), destRect.height() / srcRect.height());
-    destContext->translate(-srcRect.x(), -srcRect.y());
-    destContext->setFillGradient(m_gradient);
-    destContext->fillRect(FloatRect(FloatPoint(), m_size), destContext->fillColor(), compositeOp);
+        canvas->scale(destRect.width() / srcRect.width(), destRect.height() / srcRect.height());
+    canvas->translate(-srcRect.x(), -srcRect.y());
+    SkPaint gradientPaint(paint);
+    gradientPaint.setShader(m_gradient->shader());
+    canvas->drawRect(SkRect::MakeWH(m_size.width(), m_size.height()), gradientPaint);
 }
 
 void GradientGeneratedImage::drawTile(GraphicsContext* context, const FloatRect& srcRect)
 {
     context->setFillGradient(m_gradient);
     context->fillRect(srcRect);
 }
 
 } // namespace blink