Add Throbber control for DOMUI. Use it everywhere in options and in Sync setup UI.

chrome/browser/resources/shared_resources.grd

 <?xml version="1.0" encoding="UTF-8"?>
 <!-- This comment is only here because changes to resources are not picked up
 without changes to the corresponding grd file. paaaae -->
 <grit latest_public_release="0" current_release="1">
   <outputs>
     <output filename="grit/shared_resources.h" type="rc_header">
       <emit emit_type='prepend'></emit>
     </output>
     <output filename="grit/shared_resources_map.cc" type="resource_file_map_source" />
     <output filename="grit/shared_resources_map.h" type="resource_map_header" />
     <output filename="shared_resources.pak" type="data_package" />
   </outputs>
   <release seq="1">
     <includes>
       <include name="IDR_SHARED_CSS_ABOUT"
                file="shared/css/about_memory.css" type="BINDATA" />
       <include name="IDR_SHARED_CSS_BUTTON"
                file="shared/css/button.css" type="BINDATA" />
       <include name="IDR_SHARED_CSS_LIST"
                file="shared/css/list.css" type="BINDATA" />
       <include name="IDR_SHARED_CSS_MENU"
                file="shared/css/menu.css" type="BINDATA" />
+      <include name="IDR_SHARED_CSS_THROBBER"
+               file="shared/css/throbber.css" type="BINDATA" />
       <include name="IDR_SHARED_CSS_TREE"
                file="shared/css/tree.css" type="BINDATA" />
       <include name="IDR_SHARED_CSS_TREE_JS"
                file="shared/css/tree.css.js" type="BINDATA" />
       <include name="IDR_SHARED_JS_CR"
                file="shared/js/cr.js" type="BINDATA" />
       <include name="IDR_SHARED_JS_CR_COMMAND_LINE"
                file="shared/js/cr/command_line.js" type="BINDATA" />
       <include name="IDR_SHARED_JS_CR_EVENT_TARGET"
                file="shared/js/cr/event_target.js" type="BINDATA" />
@@ skipping 24 matching lines @@
       <include name="IDR_SHARED_JS_CR_UI_MENU"
                file="shared/js/cr/ui/menu.js" type="BINDATA" />
       <include name="IDR_SHARED_JS_CR_UI_MENU_BUTTON"
                file="shared/js/cr/ui/menu_button.js" type="BINDATA" />
       <include name="IDR_SHARED_JS_CR_UI_MENU_ITEM"
                file="shared/js/cr/ui/menu_item.js" type="BINDATA" />
       <include name="IDR_SHARED_JS_CR_UI_POSITION_UTIL"
                file="shared/js/cr/ui/position_util.js" type="BINDATA" />
       <include name="IDR_SHARED_JS_CR_UI_SPLITTER"
                file="shared/js/cr/ui/splitter.js" type="BINDATA" />
+      <include name="IDR_SHARED_JS_CR_UI_THROBBER"
+               file="shared/js/cr/ui/throbber.js" type="BINDATA" />
       <include name="IDR_SHARED_JS_CR_UI_TREE"
                file="shared/js/cr/ui/tree.js" type="BINDATA" />
       <include name="IDR_SHARED_JS_I18N_TEMPLATE"
                file="shared/js/i18n_template.js" type="BINDATA" />
       <include name="IDR_SHARED_JS_LOCAL_STRINGS"
                file="shared/js/local_strings.js" type="BINDATA" />
       <include name="IDR_SHARED_JS_PARSE_HTML_SUBSET"
                file="shared/js/parse_html_subset.js" type="BINDATA" />
       <include name="IDR_SHARED_JS_UTIL"
                file="shared/js/util.js" type="BINDATA" />
     </includes>
   </release>
 </grit>