Uses and returns the fractional width in text eliding

ui/gfx/render_text.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/render_text.h"
 
 #include <algorithm>
 
 #include "base/i18n/break_iterator.h"
 #include "base/logging.h"
@@ skipping 626 matching lines @@
   }
 
   return text_direction_;
 }
 
 VisualCursorDirection RenderText::GetVisualDirectionOfLogicalEnd() {
   return GetTextDirection() == base::i18n::LEFT_TO_RIGHT ?
       CURSOR_RIGHT : CURSOR_LEFT;
 }
 
+SizeF RenderText::GetStringSizeF() {
+  const Size size = GetStringSize();
+  return SizeF(size.width(), size.height());
+}
+
 int RenderText::GetContentWidth() {
   return GetStringSize().width() + (cursor_enabled_ ? 1 : 0);
 }
 
 void RenderText::Draw(Canvas* canvas) {
   EnsureLayout();
 
   if (clip_to_display_rect()) {
     Rect clip_rect(display_rect());
     clip_rect.Inset(ShadowValue::GetMargin(text_shadows_));
@@ skipping 470 matching lines @@
   cursor_bounds_ += delta_offset;
 }
 
 void RenderText::DrawSelection(Canvas* canvas) {
   const std::vector<Rect> sel = GetSubstringBounds(selection());
   for (std::vector<Rect>::const_iterator i = sel.begin(); i < sel.end(); ++i)
     canvas->FillRect(*i, selection_background_focused_color_);
 }
 
 }  // namespace gfx