Uses and returns the fractional width in text eliding

ui/gfx/rect_f.cc

Index: ui/gfx/rect_f.cc
diff --git a/ui/gfx/rect_f.cc b/ui/gfx/rect_f.cc
index c55752aa843e0dea806df6fe2c98100293c66f7f..d2abc23c421d63d587d6332525f9ae824078ae73 100644
--- a/ui/gfx/rect_f.cc
+++ b/ui/gfx/rect_f.cc
@@ -19,6 +19,12 @@ template class RectBase<RectF, PointF, SizeF, InsetsF, Vector2dF, float>;
 typedef class RectBase<RectF, PointF, SizeF, InsetsF, Vector2dF,
                        float> RectBaseT;
 
+#if defined(OS_MACOSX)
+CGRect RectF::ToCGRect() const {
+  return CGRectMake(x(), y(), width(), height());
+}
+#endif
+
 bool RectF::IsExpressibleAsRect() const {
   return IsExpressibleAsInt(x()) && IsExpressibleAsInt(y()) &&
       IsExpressibleAsInt(width()) && IsExpressibleAsInt(height()) &&