Allow fractional letter- word-spacing values.

Source/WebKit/chromium/src/WebFontImpl.cpp

 /*
  * Copyright (C) 2010 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 34 matching lines @@
 
 using namespace WebCore;
 
 namespace WebKit {
 
 WebFont* WebFont::create(const WebFontDescription& desc)
 {
     return new WebFontImpl(desc, desc.letterSpacing, desc.wordSpacing);
 }
 
-WebFontImpl::WebFontImpl(const FontDescription& desc, short letterSpacing, short wordSpacing)
+WebFontImpl::WebFontImpl(const FontDescription& desc, float letterSpacing, float wordSpacing)
     : m_font(desc, letterSpacing, wordSpacing)
 {
     m_font.update(0);
 }
 
 WebFontDescription WebFontImpl::fontDescription() const
 {
     return WebFontDescription(m_font.fontDescription(), m_font.letterSpacing(), m_font.wordSpacing());
 }
 
@@ skipping 84 matching lines @@
     FontCachePurgePreventer fontCachePurgePreventer;
     int totalWidth = m_font.width(run, 0);
     const WebCore::FontMetrics& fontMetrics = m_font.fontMetrics();
     return WebRect(leftBaseline.x - (fontMetrics.ascent() + fontMetrics.descent()) / 2,
                    leftBaseline.y - fontMetrics.ascent() - fontMetrics.lineGap(),
                    totalWidth + fontMetrics.ascent() + fontMetrics.descent(),
                    fontMetrics.lineSpacing()); 
 }
 
 } // namespace WebKit