Uses and returns the fractional width in text eliding

ui/gfx/platform_font_pango.cc

Index: ui/gfx/platform_font_pango.cc
diff --git a/ui/gfx/platform_font_pango.cc b/ui/gfx/platform_font_pango.cc
index 856acc2c432a209b0e451bfa86c8883db92d7e90..2627f738b069f420ab8ec548203157bd3b61f904 100644
--- a/ui/gfx/platform_font_pango.cc
+++ b/ui/gfx/platform_font_pango.cc
@@ -192,17 +192,17 @@ int PlatformFontPango::GetCapHeight() const {
   return height_pixels_;
 }
 
-int PlatformFontPango::GetAverageCharacterWidth() const {
+float PlatformFontPango::GetAverageCharacterWidth() const {
   const_cast<PlatformFontPango*>(this)->InitPangoMetrics();
   return SkScalarRound(average_width_pixels_);
 }
 
-int PlatformFontPango::GetStringWidth(const base::string16& text) const {
+float PlatformFontPango::GetStringWidth(const base::string16& text) const {
   return Canvas::GetStringWidth(text,
                                 Font(const_cast<PlatformFontPango*>(this)));
 }
 
-int PlatformFontPango::GetExpectedTextWidth(int length) const {
+float PlatformFontPango::GetExpectedTextWidth(int length) const {
   double char_width = const_cast<PlatformFontPango*>(this)->GetAverageWidth();
   return round(static_cast<float>(length) * char_width);
 }