Uses and returns the fractional width in text eliding

ui/gfx/text_utils_ios.mm

Index: ui/gfx/text_utils_ios.mm
diff --git a/ui/gfx/text_utils_ios.mm b/ui/gfx/text_utils_ios.mm
index 1841864ff85f6e33e3fbfe16323ad11c9812caa7..56c01df7f554371671427b60dde2480ee4efaf2a 100644
--- a/ui/gfx/text_utils_ios.mm
+++ b/ui/gfx/text_utils_ios.mm
@@ -14,9 +14,13 @@
 namespace gfx {
 
 int GetStringWidth(const base::string16& text, const FontList& font_list) {
+  return std::ceil(GetStringWidthF(text, font_list));
+}
+
+float GetStringWidthF(const base::string16& text, const FontList& font_list) {
   NSString* ns_text = base::SysUTF16ToNSString(text);
   NativeFont native_font = font_list.GetPrimaryFont().GetNativeFont();
-  return std::ceil([ns_text sizeWithFont:native_font].width);
+  return [ns_text sizeWithFont:native_font].width;
 }
 
 }  // namespace gfx