Implement SVG masking with slimming paint

Source/core/paint/CompositingRecorder.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "core/paint/CompositingRecorder.h"
 
 #include "core/layout/Layer.h"
 #include "core/layout/LayoutObject.h"
 #include "platform/graphics/GraphicsLayer.h"
 #include "platform/graphics/paint/CompositingDisplayItem.h"
 #include "platform/graphics/paint/DisplayItemList.h"
 
 namespace blink {
 
-CompositingRecorder::CompositingRecorder(GraphicsContext* graphicsContext, DisplayItemClient client, const CompositeOperator compositeOp, const WebBlendMode& blendMode, const float opacity)
+CompositingRecorder::CompositingRecorder(GraphicsContext* graphicsContext, DisplayItemClient client, const SkXfermode::Mode xferMode, const float opacity, const FloatRect* clipRect, ColorFilter colorFilter)
     : m_client(client)
     , m_graphicsContext(graphicsContext)
 {
     if (RuntimeEnabledFeatures::slimmingPaintEnabled()) {
         ASSERT(m_graphicsContext->displayItemList());
-        m_graphicsContext->displayItemList()->add(BeginCompositingDisplayItem::create(m_client, compositeOp, blendMode, opacity));
+        m_graphicsContext->displayItemList()->add(BeginCompositingDisplayItem::create(m_client, xferMode, opacity, clipRect, colorFilter));
     } else {
-        BeginCompositingDisplayItem beginCompositingDisplayItem(m_client, compositeOp, blendMode, opacity);
+        BeginCompositingDisplayItem beginCompositingDisplayItem(m_client, xferMode, opacity, clipRect, colorFilter);
         beginCompositingDisplayItem.replay(graphicsContext);
     }
 }
 
 CompositingRecorder::~CompositingRecorder()
 {
     if (RuntimeEnabledFeatures::slimmingPaintEnabled()) {
         ASSERT(m_graphicsContext->displayItemList());
         m_graphicsContext->displayItemList()->add(EndCompositingDisplayItem::create(m_client));
     } else {
         EndCompositingDisplayItem endCompositingDisplayItem(m_client);
         endCompositingDisplayItem.replay(m_graphicsContext);
     }
 }
 
 } // namespace blink