Uses and returns the fractional width in text eliding

ui/views/corewm/tooltip_controller.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_VIEWS_COREWM_TOOLTIP_CONTROLLER_H_
 #define UI_VIEWS_COREWM_TOOLTIP_CONTROLLER_H_
 
 #include <map>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 51 matching lines @@
   int GetMaxWidth(const gfx::Point& location) const;
 
   // Returns the bounds to fit the tooltip in.
   gfx::Rect GetBoundsForTooltip(const gfx::Point& origin) const;
 
   // Trims the tooltip to fit in the width |max_width|, setting |text| to the
   // clipped result, |width| to the width (in pixels) of the clipped text
   // and |line_count| to the number of lines of text in the tooltip. |x| and |y|
   // give the location of the tooltip in screen coordinates. |max_width| comes
   // from GetMaxWidth().
-  static void TrimTooltipToFit(int max_width,
+  static void TrimTooltipToFit(float max_width,
                                string16* text,
-                               int* width,
+                               float* width,
                                int* line_count);
 
   void TooltipTimerFired();
   void TooltipShownTimerFired();
 
   // Updates the tooltip if required (if there is any change in the tooltip
   // text or the aura::Window.
   void UpdateIfRequired();
 
   // Only used in tests.
@@ skipping 34 matching lines @@
 
   std::map<aura::Window*, int> tooltip_shown_timeout_map_;
 
   DISALLOW_COPY_AND_ASSIGN(TooltipController);
 };
 
 }  // namespace corewm
 }  // namespace views
 
 #endif  // UI_VIEWS_COREWM_TOOLTIP_CONTROLLER_H_