Implement SVG masking with slimming paint

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 271 matching lines @@
         displayItemList = DisplayItemList::create();
     GraphicsContext recordingContext(nullptr, displayItemList.get());
     recordingContext.beginRecording(dstRect);
 
     {
         ClipRecorder clipRecorder(displayItemClient(), &recordingContext, DisplayItem::ClipNodeImage, enclosingIntRect(dstRect));
 
         bool hasCompositing = compositeOp != SkXfermode::kSrcOver_Mode;
         OwnPtr<CompositingRecorder> compositingRecorder;
         if (hasCompositing || opacity < 1)
-            compositingRecorder = adoptPtr(new CompositingRecorder(&recordingContext, displayItemClient(), compositeOperatorFromSkia(compositeOp), blendModeFromSkia(compositeOp), opacity));
+            compositingRecorder = adoptPtr(new CompositingRecorder(&recordingContext, displayItemClient(), compositeOp, opacity));
 
         // We can only draw the entire frame, clipped to the rect we want. So compute where the top left
         // of the image would be if we were drawing without clipping, and translate accordingly.
         FloatSize scale(dstRect.width() / srcRect.width(), dstRect.height() / srcRect.height());
         FloatSize topLeftOffset(srcRect.location().x() * scale.width(), srcRect.location().y() * scale.height());
         FloatPoint destOffset = dstRect.location() - topLeftOffset;
         AffineTransform transform = AffineTransform::translation(destOffset.x(), destOffset.y());
         transform.scale(scale.width(), scale.height());
         TransformRecorder transformRecorder(recordingContext, displayItemClient(), transform);
 
@@ skipping 157 matching lines @@
 
     return m_page;
 }
 
 String SVGImage::filenameExtension() const
 {
     return "svg";
 }
 
 }