Uses and returns the fractional width in text eliding

ui/gfx/platform_font_ios.h

Index: ui/gfx/platform_font_ios.h
diff --git a/ui/gfx/platform_font_ios.h b/ui/gfx/platform_font_ios.h
index 2b309550327804fa44ceabdf39785de0d1d098c1..3b825476c8e5028a805b8e5ac90994c0ea5a7cef 100644
--- a/ui/gfx/platform_font_ios.h
+++ b/ui/gfx/platform_font_ios.h
@@ -21,9 +21,9 @@ class PlatformFontIOS : public PlatformFont {
   virtual int GetHeight() const OVERRIDE;
   virtual int GetBaseline() const OVERRIDE;
   virtual int GetCapHeight() 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;
@@ -49,7 +49,7 @@ class PlatformFontIOS : public PlatformFont {
   int height_;
   int ascent_;
   int cap_height_;
-  int average_width_;
+  float average_width_;
 
   DISALLOW_COPY_AND_ASSIGN(PlatformFontIOS);
 };