Uses and returns the fractional width in text eliding

ui/gfx/text_utils.h

 // Copyright 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.
 
 #ifndef UI_GFX_TEXT_UTILS_H_
 #define UI_GFX_TEXT_UTILS_H_
 
 #include "base/strings/string16.h"
 #include "ui/gfx/gfx_export.h"
 
 namespace gfx {
 
 class FontList;
 
 // Strip the accelerator char (typically '&') from a menu string.  A double
 // accelerator char ('&&') will be converted to a single char.  The out params
 // |accelerated_char_pos| and |accelerated_char_span| will be set to the index
 // and span of the last accelerated character, respectively, or -1 and 0 if
 // there was none.
 GFX_EXPORT base::string16 RemoveAcceleratorChar(const base::string16& s,
                                                 base::char16 accelerator_char,
                                                 int* accelerated_char_pos,
                                                 int* accelerated_char_span);
 
 // Returns the number of horizontal pixels needed to display the specified
 // |text| with |font_list|.
 GFX_EXPORT int GetStringWidth(const base::string16& text,
                               const FontList& font_list);
 
+// Returns the pixel width needed to display the specified |text| with
+//|font_list|. Note that the fractional width might be returned in some

[Alexei Svitkine (slow), 2013/10/07 21:43:39]

Nit: |in| -> |on|

[jianli, 2013/10/07 23:18:45]

Done.

+// platforms.
+GFX_EXPORT float GetStringWidthF(const base::string16& text,
+                                 const FontList& font_list);
+
 }  // namespace gfx
 
 #endif  // UI_GFX_TEXT_UTILS_H_