dom-ui options: record user metrics for pref changes....

chrome/browser/resources/options/personal_options.html

 <div class="page hidden" id="personalPage">
   <h1 i18n-content="personalPage"></h1>
 
   <section>
     <h3 i18n-content="sync_section"></h3>
     <div>
       <div id="not-synced-controls" class="hidden">
         <div class="section-text" id="sync_not_setup_info"
             i18n-content="sync_not_setup_info"></div>
         <div>
@@ skipping 11 matching lines @@
       </div>
     </div>
   </section>
   <section>
     <h3 i18n-content="passwords"></h3>
     <div>
       <label>
         <input id="passwords_asktosave"
             name="passwords_radio"
             pref="profile.password_manager_enabled"
-            type="radio" value="true">
+            type="radio" value="true" metric="Options_PasswordManager">
         <span i18n-content="passwords_asktosave"></span>
       </label>
       <label>
         <input id="passwords_neversave"
             name="passwords_radio"
             pref="profile.password_manager_enabled"
-            type="radio" value="false">
+            type="radio" value="false" metric="Options_PasswordManager">
         <span i18n-content="passwords_neversave"></span>
       </label>
       <div><button id="showpasswords"
           i18n-content="showpasswords"></button></div>
     </div>
   </section>
   <section>
     <h3 i18n-content="autofill"></h3>
     <div>
       <button id="autofill_options" i18n-content="autofill_options"></button>
@@ skipping 14 matching lines @@
       <div>
         <button id="themes_GTK_button"
             i18n-content="themes_GTK_button"></button>
         <button id="themes_set_classic"
             i18n-content="themes_set_classic"></button>
         <a i18n-content="themes_gallery" id="themes-gallery" href=""></a>
       </div>
       <label>
         <input name="decorations_radio"
             pref="browser.custom_chrome_frame"
-            type="radio" value="false">
+            type="radio" value="false" metric="Options_CustomFrame">
         <span i18n-content="showWindow_decorations_radio"></span>
       </label>
       <label>
         <input name="decorations_radio"
             pref="browser.custom_chrome_frame"
-            type="radio" value="true">
+            type="radio" value="true" metric="Options_CustomFrame">
         <span i18n-content="hideWindow_decorations_radio"></span>
       </label>
     </div>
   </section>
 </if>
 <if expr="pp_ifdef('toolkit_views') or os == 'win32' or os == 'darwin'">
   <section>
     <h3 i18n-content="themes"></h3>
     <div>
       <button id="themes_reset" i18n-content="themes_reset"></button>
       <a i18n-content="themes_gallery" id="themes-gallery" href=""></a>
     </div>
   </section>
 </if>
 
 </div>