Uses and returns the fractional width in text eliding

ui/gfx/platform_font_ios.mm

Index: ui/gfx/platform_font_ios.mm
diff --git a/ui/gfx/platform_font_ios.mm b/ui/gfx/platform_font_ios.mm
index 92608d322c0ec46295a393aef085e4e2ac79785f..1c373d332da70474ac14dfc5ad0f88ac51399c73 100644
--- a/ui/gfx/platform_font_ios.mm
+++ b/ui/gfx/platform_font_ios.mm
@@ -6,6 +6,8 @@
 
 #import <UIKit/UIKit.h>
 
+#include <cmath>
+
 #include "base/basictypes.h"
 #include "base/strings/sys_string_conversions.h"
 #include "base/strings/utf_string_conversions.h"
@@ -60,6 +62,10 @@ int PlatformFontIOS::GetAverageCharacterWidth() const {
 }
 
 int PlatformFontIOS::GetStringWidth(const base::string16& text) const {
+  return std::ceil(GetStringWidthF(text));
+}
+
+float PlatformFontIOS::GetStringWidthF(const base::string16& text) const {
   NSString* ns_text = base::SysUTF16ToNSString(text);
   return [ns_text sizeWithFont:GetNativeFont()].width;
 }