Making LayoutUnit conversions to Float type explicit

Source/core/rendering/RenderLayer.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  *
  * Portions are Copyright (C) 1998 Netscape Communications Corporation.
  *
  * Other contributors:
  *   Robert O'Callahan <roc+@cs.cmu.edu>
  *   David Baron <dbaron@fas.harvard.edu>
  *   Christian Biesinger <cbiesinger@web.de>
  *   Randall Jesup <rjesup@wgate.com>
@@ skipping 1044 matching lines @@
 }
 
 FloatPoint RenderLayer::perspectiveOrigin() const
 {
     if (!renderer()->hasTransform())
         return FloatPoint();
 
     const LayoutRect borderBox = toRenderBox(renderer())->borderBoxRect();
     RenderStyle* style = renderer()->style();
 
-    return FloatPoint(floatValueForLength(style->perspectiveOriginX(), borderBox.width()),
-                      floatValueForLength(style->perspectiveOriginY(), borderBox.height()));
+    return FloatPoint(floatValueForLength(style->perspectiveOriginX(), borderBox.width().toFloat()), floatValueForLength(style->perspectiveOriginY(), borderBox.height().toFloat()));
 }
 
 static inline bool isFixedPositionedContainer(RenderLayer* layer)
 {
     return layer->isRootLayer() || layer->hasTransform();
 }
 
 RenderLayer* RenderLayer::enclosingPositionedAncestor() const
 {
     RenderLayer* curr = parent();
@@ skipping 2987 matching lines @@
     }
 }
 
 void showLayerTree(const WebCore::RenderObject* renderer)
 {
     if (!renderer)
         return;
     showLayerTree(renderer->enclosingLayer());
 }
 #endif