Uses and returns the fractional width in text eliding

ui/gfx/font_list.cc

Index: ui/gfx/font_list.cc
diff --git a/ui/gfx/font_list.cc b/ui/gfx/font_list.cc
index e01483a7cc1e9c811171e56ccd8c448004fb5186..d1d7fb42f6750c1a0169d2018c16b10bbc0bc439 100644
--- a/ui/gfx/font_list.cc
+++ b/ui/gfx/font_list.cc
@@ -177,7 +177,7 @@ int FontList::GetBaseline() const {
   return common_baseline_;
 }
 
-int FontList::GetStringWidth(const base::string16& text) const {
+float FontList::GetStringWidth(const base::string16& text) const {
   // Rely on the primary font metrics for the time being.
   // TODO(yukishiino): Not only the first font, all the fonts in the list should
   // be taken into account to compute the pixels needed to display |text|.
@@ -190,7 +190,7 @@ int FontList::GetStringWidth(const base::string16& text) const {
   return GetPrimaryFont().GetStringWidth(text);
 }
 
-int FontList::GetExpectedTextWidth(int length) const {
+float FontList::GetExpectedTextWidth(int length) const {
   // Rely on the primary font metrics for the time being.
   return GetPrimaryFont().GetExpectedTextWidth(length);
 }