Separate Transform3D display item types.

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/paint/DisplayItemClient.h"
 #include "wtf/Assertions.h"
@@ skipping 108 matching lines @@
         ScrollLast = ScrollPaintPhaseLast,
         EndScrollFirst,
         EndScrollLast = EndScrollFirst + ScrollLast - ScrollFirst,
 
         BeginFilter,
         EndFilter,
         BeginCompositing,
         EndCompositing,
         BeginTransform,
         EndTransform,
+        BeginTransform3D,
+        EndTransform3D,
         BeginClipPath,
         EndClipPath,
 
         SubtreeCachedFirst,
         SubtreeCachedPaintPhaseFirst = SubtreeCachedFirst,
         SubtreeCachedPaintPhaseLast = SubtreeCachedPaintPhaseFirst + PaintPhaseMax,
         SubtreeCachedLast = SubtreeCachedPaintPhaseLast,
 
         BeginSubtreeFirst,
         BeginSubtreePaintPhaseFirst = BeginSubtreeFirst,
@@ skipping 145 matching lines @@
     virtual bool isEndAndPairedWith(const DisplayItem& other) const override = 0;
 #endif
 
 private:
     virtual bool isEnd() const override final { return true; }
 };
 
 } // namespace blink
 
 #endif // DisplayItem_h