Uses and returns the fractional width in text eliding

ui/gfx/rect_f.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/gfx/rect_f.h"
 
 #include <algorithm>
 
 #include "base/logging.h"
 #include "base/strings/stringprintf.h"
 #include "ui/gfx/insets_f.h"
 #include "ui/gfx/rect_base_impl.h"
 #include "ui/gfx/safe_integer_conversions.h"
 
 namespace gfx {
 
 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()) &&
       IsExpressibleAsInt(right()) && IsExpressibleAsInt(bottom());
 }
 
 std::string RectF::ToString() const {
   return base::StringPrintf("%s %s",
                             origin().ToString().c_str(),
                             size().ToString().c_str());
@@ skipping 19 matching lines @@
 
 RectF BoundingRect(const PointF& p1, const PointF& p2) {
   float rx = std::min(p1.x(), p2.x());
   float ry = std::min(p1.y(), p2.y());
   float rr = std::max(p1.x(), p2.x());
   float rb = std::max(p1.y(), p2.y());
   return RectF(rx, ry, rr - rx, rb - ry);
 }
 
 }  // namespace gfx