Fix 'except' and 'prefer' spelling.

webkit/glue/webkit_strings.grd

Index: webkit/glue/webkit_strings.grd
diff --git a/webkit/glue/webkit_strings.grd b/webkit/glue/webkit_strings.grd
index f62606f1c798ea943a8fd38327196aaa1a5afa56..02cd4b41f1bf74dc42775d1a09f600272198d784 100644
--- a/webkit/glue/webkit_strings.grd
+++ b/webkit/glue/webkit_strings.grd
@@ -290,13 +290,13 @@ below:
       <message name="IDS_FORM_OTHER_WEEK_LABEL" desc="Label for button that opens a full week picker so the user can choose dates other than the ones in the list." meaning="for week label">
         Other...
       </message>
-      <message name="IDS_FORM_PLACEHOLDER_FOR_DAY_OF_MONTH_FIELD" desc="Text for denoting day of month field position in date format. Short text is prefered. See http://crbug.com/152632 for samples.">
+      <message name="IDS_FORM_PLACEHOLDER_FOR_DAY_OF_MONTH_FIELD" desc="Text for denoting day of month field position in date format. Short text is preferred. See http://crbug.com/152632 for samples.">
         dd
       </message>
-      <message name="IDS_FORM_PLACEHOLDER_FOR_MONTH_FIELD" desc="Text for denoting month field position in date format. Short text is prefered. See http://crbug.com/152632 for samples.">
+      <message name="IDS_FORM_PLACEHOLDER_FOR_MONTH_FIELD" desc="Text for denoting month field position in date format. Short text is preferred. See http://crbug.com/152632 for samples.">
         mm
       </message>
-      <message name="IDS_FORM_PLACEHOLDER_FOR_YEAR_FIELD" desc="Text for denoting day of month field position in date format. Short text is prefered. See http://crbug.com/152632 for samples.">
+      <message name="IDS_FORM_PLACEHOLDER_FOR_YEAR_FIELD" desc="Text for denoting day of month field position in date format. Short text is preferred. See http://crbug.com/152632 for samples.">
         yyyy
       </message>
       <message name="IDS_FORM_SELECT_MENU_LIST_TEXT" desc="Text for the menu list rendering of a select element.">