Allow fractional letter- word-spacing values.

Source/WebKit/chromium/src/WebFontImpl.h

 /*
  * 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 22 matching lines @@
 
 #include "WebFont.h"
 #include "core/platform/graphics/Font.h"
 
 namespace WebCore { class FontDescription; }
 
 namespace WebKit {
 
 class WebFontImpl : public WebFont {
 public:
-    WebFontImpl(const WebCore::FontDescription&, short letterSpacing, short wordSpacing);
+    WebFontImpl(const WebCore::FontDescription&, float letterSpacing, float wordSpacing);
 
     virtual WebFontDescription fontDescription() const;
 
     virtual int ascent() const;
     virtual int descent() const;
     virtual int height() const;
     virtual int lineSpacing() const;
     virtual float xHeight() const;
 
     virtual void drawText(WebCanvas*, const WebTextRun&, const WebFloatPoint& leftBaseline, WebColor,
                           const WebRect& clip, bool canvasIsOpaque, int from = 0, int to = -1) const;
     virtual int calculateWidth(const WebTextRun&) const;
     virtual int offsetForPosition(const WebTextRun&, float position) const;
     virtual WebFloatRect selectionRectForText(const WebTextRun&, const WebFloatPoint& leftBaseline,
                                               int height, int from = 0, int to = -1) const;
 
 private:
     // Estimates the bounding box of the given text.
     WebRect estimateTextBounds(const WebTextRun&, const WebFloatPoint& leftBaseline) const;
 
     WebCore::Font m_font;
 };
 
 } // namespace WebKit
 
 #endif