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 0ddf363c3f733937799649d63d967b95c16e36bc..d079bc55b55024a487096efec4bc799b4d91f38d 100644
--- a/ui/gfx/platform_font_pango.cc
+++ b/ui/gfx/platform_font_pango.cc
@@ -182,17 +182,17 @@ int PlatformFontPango::GetBaseline() const {
   return ascent_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);
 }