/indra/newview/skins/default/xui/en/widgets/search_editor.xml

<?xml version="1.0" encoding="utf-8" standalone="yes" ?>
<search_editor
  name="search_editor"
  clear_button_visible="false"
  search_button_visible="true"
  text_pad_left="6" 
  text_pad_right="6" 
  select_on_focus="true"
  text_tentative_color="TextFgTentativeColor"
  background_image="TextField_Search_Off"
  background_image_disabled="TextField_Search_Disabled"
  background_image_focused="TextField_Search_Active" >
  <search_button 
    top_pad="4"
    left_pad="4" 
    width="13"
    height="13" 
	  image_unselected="Search"
	  image_selected="Search" />
  <clear_button
   bottom="4"
   height="16"
   image_unselected="Icon_Close_Foreground"
   image_selected="Icon_Close_Press"
   pad_right="4"
   pad_left="4"
   width="16" />
</search_editor>