[SPv2] Add CSS mask support

third_party/WebKit/Source/core/paint/PaintLayer.h

 /*
  * Copyright (C) 2003, 2009, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Intel Corporation. All rights reserved.
  *
  * Portions are Copyright (C) 1998 Netscape Communications Corporation.
  *
  * Other contributors:
  *   Robert O'Callahan <roc+@cs.cmu.edu>
  *   David Baron <dbaron@fas.harvard.edu>
  *   Christian Biesinger <cbiesinger@web.de>
@@ skipping 504 matching lines @@
   void clearCompositedLayerMapping(bool layerBeingDestroyed = false);
   CompositedLayerMapping* groupedMapping() const {
     return m_rareData ? m_rareData->groupedMapping : nullptr;
   }
   enum SetGroupMappingOptions {
     InvalidateLayerAndRemoveFromMapping,
     DoNotInvalidateLayerAndRemoveFromMapping
   };
   void setGroupedMapping(CompositedLayerMapping*, SetGroupMappingOptions);
 
-  bool hasCompositedMask() const;
+  bool maskBlendingAppliedByCompositor() const;
   bool hasCompositedClippingMask() const;
   bool needsCompositedScrolling() const {
     return m_scrollableArea && m_scrollableArea->needsCompositedScrolling();
   }
 
   // Paint invalidation containers can be self-composited or squashed.
   // In the former case, these methods do nothing.
   // In the latter case, they adjust from the space of the squashed PaintLayer
   // to the space of the PaintLayer into which it squashes.
   //
@@ skipping 713 matching lines @@
 
 }  // namespace blink
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 CORE_EXPORT void showLayerTree(const blink::PaintLayer*);
 CORE_EXPORT void showLayerTree(const blink::LayoutObject*);
 #endif
 
 #endif  // Layer_h