Implement SVG masking with slimming paint

Source/core/paint/SVGPaintContext.cpp

Index: Source/core/paint/SVGPaintContext.cpp
diff --git a/Source/core/paint/SVGPaintContext.cpp b/Source/core/paint/SVGPaintContext.cpp
index a35cc2b3aa50ef313dbaceae3e97b2381e01a8e8..00e0ee0bfa05bdc179c7c79aa575e7d332ef2c34 100644
--- a/Source/core/paint/SVGPaintContext.cpp
+++ b/Source/core/paint/SVGPaintContext.cpp
@@ -96,7 +96,7 @@ bool SVGPaintContext::applyClipMaskAndFilterIfNecessary()
         return false;
 
     if (!isIsolationInstalled() && SVGLayoutSupport::isIsolationRequired(m_object))
-        m_compositingRecorder = adoptPtr(new CompositingRecorder(m_paintInfo.context, m_object->displayItemClient(), m_paintInfo.context->compositeOperationDeprecated(), WebBlendModeNormal, 1));
+        m_compositingRecorder = adoptPtr(new CompositingRecorder(m_paintInfo.context, m_object->displayItemClient(), WebCoreCompositeToSkiaComposite(m_paintInfo.context->compositeOperationDeprecated(), WebBlendModeNormal), 1));
 
     return true;
 }
@@ -116,7 +116,7 @@ void SVGPaintContext::applyCompositingIfNecessary()
         m_clipRecorder = adoptPtr(new FloatClipRecorder(*m_paintInfo.context, m_object->displayItemClient(), m_paintInfo.phase, m_object->paintInvalidationRectInLocalCoordinates()));
         WebBlendMode blendMode = hasBlendMode ? style.blendMode() : WebBlendModeNormal;
         CompositeOperator compositeOp = hasBlendMode ? CompositeSourceOver : m_paintInfo.context->compositeOperationDeprecated();
-        m_compositingRecorder = adoptPtr(new CompositingRecorder(m_paintInfo.context, m_object->displayItemClient(), compositeOp, blendMode, opacity));
+        m_compositingRecorder = adoptPtr(new CompositingRecorder(m_paintInfo.context, m_object->displayItemClient(), WebCoreCompositeToSkiaComposite(compositeOp, blendMode), opacity));
     }
 }