Uses and returns the fractional width in text eliding

ui/gfx/font.h

Index: ui/gfx/font.h
diff --git a/ui/gfx/font.h b/ui/gfx/font.h
index 020ab64f744e1d807aaa404ddbf6bc046d218f3a..9365223d084c9047e8aef37279529a5ffe653195 100644
--- a/ui/gfx/font.h
+++ b/ui/gfx/font.h
@@ -72,17 +72,15 @@ class GFX_EXPORT Font {
   // Returns the cap height of the font.
   int GetCapHeight() const;
 
-  // Returns the average character width for the font.
-  int GetAverageCharacterWidth() const;
+  // Returns the pixel width of an average character for the font.
+  float GetAverageCharacterWidth() const;
 
-  // Returns the number of horizontal pixels needed to display the specified
-  // string.
-  int GetStringWidth(const base::string16& text) const;
+  // Returns the pixel width needed to display the specified string.
+  float GetStringWidth(const base::string16& text) const;
 
-  // Returns the expected number of horizontal pixels needed to display the
-  // specified length of characters. Call GetStringWidth() to retrieve the
-  // actual number.
-  int GetExpectedTextWidth(int length) const;
+  // Returns the expected pixel width needed to display the specified length of
+  // characters. Call GetStringWidth() to retrieve the actual number.
+  float GetExpectedTextWidth(int length) const;
 
   // Returns the style of the font.
   int GetStyle() const;