MD Settings: Display a message when no other search engines exist.

chrome/app/settings_strings.grdp

 <?xml version="1.0" encoding="utf-8"?>
 <!-- Settings-specific strings (included from generated_resources.grd). -->
 <grit-part>
   <!-- Main Page -->
   <if expr="chromeos">
     <message name="IDS_SETTINGS_SECONDARY_USER_BANNER" desc="Banner displayed in settings page when the user is secondary in a multi-profile session.">
       Some settings belonging to <ph name="PRIMARY_EMAIL">$1<ex>john@google.com</ex></ph> are being shared with you. These settings only affect your account when using multiple sign-in.
     </message>
   </if>
 
@@ skipping 1665 matching lines @@
   </message>
   <message name="IDS_SETTINGS_SEARCH_ENGINES_NOT_VALID" desc="Text indicating that the input to a given text field in the add/edit search engine dialog is not invalid.">
    Not valid
   </message>
   <message name="IDS_SETTINGS_SEARCH_ENGINES_DEFAULT_ENGINES" desc="Label for 'default' Search Engines section">
     Default search engines
   </message>
   <message name="IDS_SETTINGS_SEARCH_ENGINES_OTHER_ENGINES" desc="Label for 'other' Search Engines section">
     Other search engines
   </message>
+  <message name="IDS_SETTINGS_SEARCH_ENGINES_NO_OTHER_ENGINES" desc="Label shown when the 'other' Search engines section is empty">
+    No other search engines found
+  </message>
   <message name="IDS_SETTINGS_SEARCH_ENGINES_EXTENSION_ENGINES" desc="Label for a section that displays search engines added by extensions">
     Search engines added by extensions
   </message>
   <message name="IDS_SETTINGS_SEARCH_ENGINES_SEARCH_ENGINE" desc="Label for a table column that holds the name of a search engine">
     Search engine
   </message>
   <message name="IDS_SETTINGS_SEARCH_ENGINES_KEYWORD" desc="Label for Keyword column header for a search engine">
     Keyword
   </message>
   <message name="IDS_SETTINGS_SEARCH_ENGINES_QUERY_URL" desc="Label for Query URL column header for a search engine">
@@ skipping 1167 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>