Uses and returns the fractional width in text eliding

ui/gfx/platform_font_win.h

Index: ui/gfx/platform_font_win.h
diff --git a/ui/gfx/platform_font_win.h b/ui/gfx/platform_font_win.h
index 77f3658132a1eabdeae3c65cfb84470bf6c95707..f653ab352566130b8cd8a8f340320ec7855057e3 100644
--- a/ui/gfx/platform_font_win.h
+++ b/ui/gfx/platform_font_win.h
@@ -57,9 +57,9 @@ class GFX_EXPORT PlatformFontWin : public PlatformFont {
   virtual Font DeriveFont(int size_delta, int style) const OVERRIDE;
   virtual int GetHeight() const OVERRIDE;
   virtual int GetBaseline() const OVERRIDE;
-  virtual int GetAverageCharacterWidth() const OVERRIDE;
-  virtual int GetStringWidth(const base::string16& text) const OVERRIDE;
-  virtual int GetExpectedTextWidth(int length) const OVERRIDE;
+  virtual float GetAverageCharacterWidth() const OVERRIDE;
+  virtual float GetStringWidth(const base::string16& text) const OVERRIDE;
+  virtual float GetExpectedTextWidth(int length) const OVERRIDE;
   virtual int GetStyle() const OVERRIDE;
   virtual std::string GetFontName() const OVERRIDE;
   virtual int GetFontSize() const OVERRIDE;