Delete some dead reflection code in CompositedLayerMapping.

Source/platform/graphics/GraphicsLayer.h

 /*
  * Copyright (C) 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Intel Corporation. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 116 matching lines @@
 
     // The given layer will replicate this layer and its children; the replica renders behind this layer.
     void setReplicatedByLayer(GraphicsLayer*);
     // Whether this layer is being replicated by another layer.
     bool isReplicated() const { return m_replicaLayer; }
     // The layer that replicates this layer (if any).
     GraphicsLayer* replicaLayer() const { return m_replicaLayer; }
     // The layer being replicated.
     GraphicsLayer* replicatedLayer() const { return m_replicatedLayer; }
 
-    const FloatPoint& replicatedLayerPosition() const { return m_replicatedLayerPosition; }
-    void setReplicatedLayerPosition(const FloatPoint& p) { m_replicatedLayerPosition = p; }
-
     enum ShouldSetNeedsDisplay {
         DontSetNeedsDisplay,
         SetNeedsDisplay
     };
 
     // Offset is origin of the renderer minus origin of the graphics layer (so either zero or negative).
     IntSize offsetFromRenderer() const { return m_offsetFromRenderer; }
     void setOffsetFromRenderer(const IntSize&, ShouldSetNeedsDisplay = SetNeedsDisplay);
 
     // The position of the layer (the location of its top-left corner in its parent)
@@ skipping 257 matching lines @@
 };
 
 } // namespace WebCore
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 void PLATFORM_EXPORT showGraphicsLayerTree(const WebCore::GraphicsLayer*);
 #endif
 
 #endif // GraphicsLayer_h