Make DisplayItemClient an interface

third_party/WebKit/Source/core/paint/Transform3DRecorder.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 Transform3DRecorder_h
 #define Transform3DRecorder_h
 
 #include "platform/graphics/paint/DisplayItem.h"
 #include "wtf/Allocator.h"
 
 namespace blink {
 
 class FloatPoint3D;
 class GraphicsContext;
 class TransformationMatrix;
 
 class Transform3DRecorder {
     STACK_ALLOCATED();
 public:
     Transform3DRecorder(
         GraphicsContext&,
-        const DisplayItemClientWrapper&,
+        const DisplayItemClient&,
         DisplayItem::Type,
         const TransformationMatrix&,
         const FloatPoint3D& transformOrigin);
     ~Transform3DRecorder();
 
 private:
     GraphicsContext& m_context;
-    DisplayItemClientWrapper m_client;
+    const DisplayItemClient& m_client;
     DisplayItem::Type m_type;
     bool m_skipRecordingForIdentityTransform;
 };
 
 } // namespace blink
 
 #endif // Transform3DRecorder_h