Support mask images for filter-based -webkit-box-reflect.

third_party/WebKit/Source/platform/graphics/paint/DisplayItem.h

 // 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.
 
 #ifndef DisplayItem_h
 #define DisplayItem_h
 
 #include "platform/PlatformExport.h"
 #include "platform/graphics/ContiguousContainer.h"
 #include "platform/graphics/paint/DisplayItemClient.h"
@@ skipping 89 matching lines @@
         TableCellBackgroundFromRow,
         // Table collapsed borders can be painted together (e.g., left & top) but there are at most 4 phases of collapsed
         // border painting for a single cell. To disambiguate these phases of collapsed border painting, a mask is used.
         // TableCollapsedBorderBase can be larger than TableCollapsedBorderUnalignedBase to ensure the base lower bits are 0's.
         TableCollapsedBorderUnalignedBase,
         TableCollapsedBorderBase = (((TableCollapsedBorderUnalignedBase - 1) >> 4) + 1) << 4,
         TableCollapsedBorderLast = TableCollapsedBorderBase + 0x0f,
         VideoBitmap,
         WebPlugin,
         WebFont,
-        DrawingLast = WebFont,
+        ReflectionMask,
+        DrawingLast = ReflectionMask,
 
         CachedDrawingFirst,
         CachedDrawingLast = CachedDrawingFirst + DrawingLast - DrawingFirst,
 
         ForeignLayerFirst,
         ForeignLayerPlugin = ForeignLayerFirst,
         ForeignLayerLast = ForeignLayerPlugin,
 
         ClipFirst,
         ClipBoxPaintPhaseFirst = ClipFirst,
@@ skipping 277 matching lines @@
     bool isEndAndPairedWith(DisplayItem::Type otherType) const override = 0;
 #endif
 
 private:
     bool isEnd() const final { return true; }
 };
 
 } // namespace blink
 
 #endif // DisplayItem_h