[SPv2] Add CSS mask support

third_party/WebKit/Source/core/paint/InlineFlowBoxPainter.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 "core/paint/InlineFlowBoxPainter.h"
 
 #include "core/layout/api/LineLayoutAPIShim.h"
 #include "core/layout/line/RootInlineBox.h"
 #include "core/paint/BoxPainter.h"
 #include "core/paint/PaintInfo.h"
@@ skipping 332 matching lines @@
   m_inlineFlowBox.flipForWritingMode(localRect);
   LayoutPoint adjustedPaintOffset = paintOffset + localRect.location();
 
   const NinePieceImage& maskNinePieceImage =
       m_inlineFlowBox.getLineLayoutItem().style()->maskBoxImage();
   StyleImage* maskBoxImage =
       m_inlineFlowBox.getLineLayoutItem().style()->maskBoxImage().image();
 
   // Figure out if we need to push a transparency layer to render our mask.
   bool pushTransparencyLayer = false;
-  bool compositedMask =
-      m_inlineFlowBox.getLineLayoutItem().hasLayer() &&
-      m_inlineFlowBox.boxModelObject().layer()->hasCompositedMask();
   bool flattenCompositingLayers =
       paintInfo.getGlobalPaintFlags() & GlobalPaintFlattenCompositingLayers;
+  bool maskBlendingAppliedByCompositor =
+      !flattenCompositingLayers &&
+      m_inlineFlowBox.getLineLayoutItem().hasLayer() &&
+      m_inlineFlowBox.boxModelObject()
+          .layer()
+          ->maskBlendingAppliedByCompositor();
   SkBlendMode compositeOp = SkBlendMode::kSrcOver;
-  if (!compositedMask || flattenCompositingLayers) {
+  if (!maskBlendingAppliedByCompositor) {
     if ((maskBoxImage &&
          m_inlineFlowBox.getLineLayoutItem()
              .style()
              ->maskLayers()
              .hasImage()) ||
         m_inlineFlowBox.getLineLayoutItem().style()->maskLayers().next()) {
       pushTransparencyLayer = true;
       paintInfo.context.beginLayer(1.0f, SkBlendMode::kDstIn);
     } else {
       // TODO(fmalita): passing a dst-in xfer mode down to
@@ skipping 72 matching lines @@
       rect.setHeight(logicalHeight);
     } else {
       rect.setX(logicalTop);
       rect.setWidth(logicalHeight);
     }
   }
   return rect;
 }
 
 }  // namespace blink