Making LayoutUnit conversions to Float type explicit

Source/core/css/CSSComputedStyleDeclaration.cpp

 /*
  * Copyright (C) 2004 Zack Rusin <zack@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007 Nicholas Shanks <webkit@nickshanks.com>
  * Copyright (C) 2011 Sencha, Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
@@ skipping 2037 matching lines @@
         }
         case CSSPropertyMarginRight: {
             Length marginRight = style->marginRight();
             if (marginRight.isFixed() || !renderer || !renderer->isBox())
                 return zoomAdjustedPixelValueForLength(marginRight, *style);
             float value;
             if (marginRight.isPercent()) {
                 // RenderBox gives a marginRight() that is the distance between the right-edge of the child box
                 // and the right-edge of the containing box, when display == BLOCK. Let's calculate the absolute
                 // value of the specified margin-right % instead of relying on RenderBox's marginRight() value.
-                value = minimumValueForLength(marginRight, toRenderBox(renderer)->containingBlockLogicalWidthForContent());
+                value = minimumValueForLength(marginRight, toRenderBox(renderer)->containingBlockLogicalWidthForContent()).toFloat();
             } else {
-                value = toRenderBox(renderer)->marginRight();
+                value = toRenderBox(renderer)->marginRight().toFloat();
             }
             return zoomAdjustedPixelValue(value, *style);
         }
         case CSSPropertyMarginBottom: {
             Length marginBottom = style->marginBottom();
             if (marginBottom.isFixed() || !renderer || !renderer->isBox())
                 return zoomAdjustedPixelValueForLength(marginBottom, *style);
             return zoomAdjustedPixelValue(toRenderBox(renderer)->marginBottom(), *style);
         }
         case CSSPropertyMarginLeft: {
@@ skipping 971 matching lines @@
     static const CSSPropertyID propertiesAfterSlashSeperator[3] = { CSSPropertyBackgroundSize, CSSPropertyBackgroundOrigin,
                                                                     CSSPropertyBackgroundClip };
 
     RefPtrWillBeRawPtr<CSSValueList> list = CSSValueList::createSlashSeparated();
     list->append(valuesForShorthandProperty(StylePropertyShorthand(CSSPropertyBackground, propertiesBeforeSlashSeperator, WTF_ARRAY_LENGTH(propertiesBeforeSlashSeperator))));
     list->append(valuesForShorthandProperty(StylePropertyShorthand(CSSPropertyBackground, propertiesAfterSlashSeperator, WTF_ARRAY_LENGTH(propertiesAfterSlashSeperator))));
     return list.release();
 }
 
 } // namespace WebCore