Uses and returns the fractional width in text eliding

ui/gfx/canvas.h

 // 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.
 
 #ifndef UI_GFX_CANVAS_H_
 #define UI_GFX_CANVAS_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 107 matching lines @@
   // this method can be private.
   void RecreateBackingCanvas(const Size& size,
                              float image_scale,
                              bool is_opaque);
 
   // Compute the size required to draw some text with the provided fonts.
   // Attempts to fit the text with the provided width and height. Increases
   // height and then width as needed to make the text fit. This method
   // supports multiple lines. On Skia only a line_height can be specified and
   // specifying a 0 value for it will cause the default height to be used.
-  static void SizeStringInt(const base::string16& text,
-                            const FontList& font_list,
-                            int* width,
-                            int* height,
-                            int line_height,
-                            int flags);
+  static void SizeStringToFit(const base::string16& text,
+                              const FontList& font_list,
+                              float* width,
+                              float* height,
+                              int line_height,
+                              int flags);
   // Obsolete version.  Use the above version which takes FontList.
-  static void SizeStringInt(const base::string16& text,
-                            const Font& font,
-                            int* width,
-                            int* height,
-                            int line_height,
-                            int flags);
+  static void SizeStringToFit(const base::string16& text,
+                              const Font& font,
+                              float* width,
+                              float* height,
+                              int line_height,
+                              int flags);
 
   // Returns the number of horizontal pixels needed to display the specified
   // |text| with |font_list|.
-  static int GetStringWidth(const base::string16& text,
+  static float GetStringWidth(const base::string16& text,
                             const FontList& font_list);

[msw, 2013/10/01 02:42:48]

nit: indent this line to match the one above.

[jianli, 2013/10/01 18:56:50]

Done.

   // Obsolete version.  Use the above version which takes FontList.
-  static int GetStringWidth(const base::string16& text, const Font& font);
+  static float GetStringWidth(const base::string16& text, const Font& font);
 
   // Returns the default text alignment to be used when drawing text on a
   // Canvas based on the directionality of the system locale language.
   // This function is used by Canvas::DrawStringInt when the text alignment
   // is not specified.
   //
   // This function returns either Canvas::TEXT_ALIGN_LEFT or
   // Canvas::TEXT_ALIGN_RIGHT.
   static int DefaultCanvasTextAlignment();
 
@@ skipping 320 matching lines @@
 
   skia::RefPtr<skia::PlatformCanvas> owned_canvas_;
   SkCanvas* canvas_;
 
   DISALLOW_COPY_AND_ASSIGN(Canvas);
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_CANVAS_H_