[windows] Fix checkmark position for WebUI CSS checkbox input elements.

chrome/browser/resources/shared/css/checkbox.css

Index: chrome/browser/resources/shared/css/checkbox.css
===================================================================
--- chrome/browser/resources/shared/css/checkbox.css	(revision 113322)
+++ chrome/browser/resources/shared/css/checkbox.css	(working copy)
@@ -13,6 +13,8 @@
   border-radius: 3px;
   border: 1px solid #a0a0a0;
   display: inline-block;
+  font: inherit;  /* TODO(csilv): investigate why this is required on the
+                     Windows platform. http://crbug.com/105811 */

[dpapad, 2011/12/12 17:53:20]

This broke the checkmark position on Linux (see bug 107217). From the comment it
seems that it is only needed for Windows. If so it should be within

html[os='win'] ..... {
  font: inherit;
}

   height: 16px;
   margin-bottom: 0;
   margin-top: 0;