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

third_party/WebKit/Source/platform/graphics/paint/DisplayItem.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 "platform/graphics/paint/DisplayItem.h"
 
 namespace blink {
 
 struct SameSizeAsDisplayItem {
     virtual ~SameSizeAsDisplayItem() { } // Allocate vtable pointer.
@@ skipping 92 matching lines @@
         DEBUG_STRING_CASE(ScrollbarTrackBackground);
         DEBUG_STRING_CASE(ScrollbarCompositedScrollbar);
         DEBUG_STRING_CASE(SelectionTint);
         DEBUG_STRING_CASE(TableCellBackgroundFromColumnGroup);
         DEBUG_STRING_CASE(TableCellBackgroundFromColumn);
         DEBUG_STRING_CASE(TableCellBackgroundFromSection);
         DEBUG_STRING_CASE(TableCellBackgroundFromRow);
         DEBUG_STRING_CASE(VideoBitmap);
         DEBUG_STRING_CASE(WebPlugin);
         DEBUG_STRING_CASE(WebFont);
+        DEBUG_STRING_CASE(ReflectionMask);
 
         DEFAULT_CASE;
     }
 }
 
 static WTF::String drawingTypeAsDebugString(DisplayItem::Type type)
 {
     PAINT_PHASE_BASED_DEBUG_STRINGS(Drawing);
     return "Drawing" + specialDrawingTypeAsDebugString(type);
 }
@@ skipping 126 matching lines @@
     stringBuilder.append('"');
     if (m_skippedCache)
         stringBuilder.append(", skippedCache: true");
     if (m_scope)
         stringBuilder.append(String::format(", scope: %d", m_scope));
 }
 
 #endif
 
 } // namespace blink