[MD settings] advanced font settings extension link

chrome/app/settings_strings.grdp

 <?xml version="1.0" encoding="utf-8"?>
 <!-- Settings-specific strings (included from generated_resources.grd). -->
 <grit-part>
   <!-- Policy Indicators -->
   <message name="IDS_SETTINGS_CONTROLLED_SETTING_EXTENSION" desc="Text displayed in the controlled settings indicator tooltip when a setting's value is enforced by an extension.">
     This setting is controlled by extension <ph name="NAME">$1<ex>Settings Extension</ex></ph>
   </message>
 
   <!-- Accessibility Page -->
   <message name="IDS_SETTINGS_ACCESSIBILITY" desc="Name of the settings page which displays accessibility preferences.">
@@ skipping 1094 matching lines @@
   </message>
   <message name="IDS_SETTINGS_LOREM_IPSUM" desc="Gibberish example text in settings.">
     Lorem ipsum dolor sit amet, consectetur adipiscing elit.
   </message>
   <message name="IDS_SETTINGS_LOADING" desc="Placeholder text while waiting for font settings to appear, shown only until font settings have loaded.">
     Loading...
   </message>
   <message name="IDS_SETTINGS_ADVANCED_FONT_SETTINGS" desc="Label for advanced font settings.">
     Advanced font settings
   </message>
+  <message name="IDS_SETTINGS_OPEN_ADVANCED_FONT_SETTINGS" desc="Sub-label for opening advanced font extension options.">
+   Open extension options
+  </message>
   <message name="IDS_SETTINGS_QUICK_BROWN_FOX" desc="Example text to see a font style and size sample.  The quick brown fox sentence is a playful way to show all 26 English letters.  Any example text will do.  There is no need to translate this exactly.">
     The quick brown fox jumps over the lazy dog
   </message>
   <message name="IDS_SETTINGS_REQUIRES_WEB_STORE_EXTENSION" desc="Sub-label for advanced font settings explaining that an extension from the Web Store is required.">
     Requires extension from the Chrome Web Store
   </message>
 
   <!-- Device Page -->
   <if expr="chromeos">
     <message name="IDS_SETTINGS_DEVICE_TITLE" desc="Name of the settings page which displays device and peripheral settings.">
@@ skipping 76 matching lines @@
       System
     </message>
     <message name="IDS_SETTINGS_SYSTEM_HARDWARE_ACCELERATION_LABEL" desc="Label for the checkbox that forces Chrome to render via hardware acceleration (GPU) when available.">
       Use hardware acceleration when available
     </message>
     <message name="IDS_SETTINGS_SYSTEM_PROXY_SETTINGS_BUTTON" desc="Text for the button that changes a user's network proxy settings.">
       Change proxy settings
     </message>
   </if>
 </grit-part>