MD Settings: Lazy load the contents of the "advanced" settings.

chrome/browser/resources/settings/settings_resources.grd

 <?xml version="1.0" encoding="UTF-8"?>
 <grit latest_public_release="0" current_release="1" output_all_resource_defines="false">
   <outputs>
     <output filename="grit/settings_resources.h" type="rc_header">
       <emit emit_type='prepend'></emit>
     </output>
     <output filename="grit/settings_resources_map.cc"
             type="resource_file_map_source" />
     <output filename="grit/settings_resources_map.h"
             type="resource_map_header" />
@@ skipping 401 matching lines @@
                  type="chrome_html" />
       <structure name="IDR_SETTINGS_CONTROLS_PREF_CONTROL_BEHAVIOR_JS"
                  file="controls/pref_control_behavior.js"
                  type="chrome_html" />
       <structure name="IDR_SETTINGS_CONTROLS_RADIO_GROUP_HTML"
                  file="controls/settings_radio_group.html"
                  type="chrome_html" />
       <structure name="IDR_SETTINGS_CONTROLS_RADIO_GROUP_JS"
                  file="controls/settings_radio_group.js"
                  type="chrome_html" />
-      <structure name="IDR_SETTINGS_CONTROLS_SETTINGS_IDLE_RENDER_HTML"
-                 file="controls/settings_idle_render.html"
+      <structure name="IDR_SETTINGS_CONTROLS_SETTINGS_IDLE_LOAD_HTML"
+                 file="controls/settings_idle_load.html"
                  type="chrome_html" />
-      <structure name="IDR_SETTINGS_CONTROLS_SETTINGS_IDLE_RENDER_JS"
-                 file="controls/settings_idle_render.js"
+      <structure name="IDR_SETTINGS_CONTROLS_SETTINGS_IDLE_LOAD_JS"
+                 file="controls/settings_idle_load.js"
                  type="chrome_html" />
       <structure name="IDR_SETTINGS_CONTROLS_SLIDER_HTML"
                  file="controls/settings_slider.html"
                  type="chrome_html" />
       <structure name="IDR_SETTINGS_CONTROLS_SLIDER_JS"
                  file="controls/settings_slider.js"
                  type="chrome_html" />
       <structure name="IDR_SETTINGS_CONTROLS_TOGGLE_BUTTON_HTML"
                  file="controls/settings_toggle_button.html"
                  type="chrome_html" />
@@ skipping 849 matching lines @@
                    type="chrome_html" />
         <structure name="IDR_SETTINGS_USERS_PAGE_HTML"
                    file="people_page/users_page.html"
                    type="chrome_html"
                    preprocess="true"
                    allowexternalscript="true" />
       </if>
     </structures>
   </release>
 </grit>