Remove some dead code from rendering/ folder

Source/core/rendering/compositing/CompositedLayerMapping.cpp

 /*
  * Copyright (C) 2009, 2010, 2011 Apple Inc. 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 1675 matching lines @@
     RenderStyle* style = renderer()->style();
 
     FloatPoint3D origin;
     origin.setX(floatValueForLength(style->transformOriginX(), borderBox.width()));
     origin.setY(floatValueForLength(style->transformOriginY(), borderBox.height()));
     origin.setZ(style->transformOriginZ());
 
     return origin;
 }
 
-FloatPoint CompositedLayerMapping::computePerspectiveOrigin(const IntRect& borderBox) const
-{
-    RenderStyle* style = renderer()->style();
-
-    float boxWidth = borderBox.width();
-    float boxHeight = borderBox.height();
-
-    FloatPoint origin;
-    origin.setX(floatValueForLength(style->perspectiveOriginX(), boxWidth));
-    origin.setY(floatValueForLength(style->perspectiveOriginY(), boxHeight));
-
-    return origin;
-}
-
 // Return the offset from the top-left of this compositing layer at which the renderer's contents are painted.
 LayoutSize CompositedLayerMapping::contentOffsetInCompostingLayer() const
 {
     return LayoutSize(-m_compositedBounds.x(), -m_compositedBounds.y());
 }
 
 LayoutRect CompositedLayerMapping::contentsBox() const
 {
     LayoutRect contentsBox = contentsRect(renderer());
     contentsBox.move(contentOffsetInCompostingLayer());
@@ skipping 433 matching lines @@
     } else if (graphicsLayer == m_scrollingContentsLayer.get()) {
         name = "Scrolling Contents Layer";
     } else {
         ASSERT_NOT_REACHED();
     }
 
     return name;
 }
 
 } // namespace WebCore