Add a Physical Web omnibox autocomplete provider

components/omnibox_strings.grdp

 <?xml version="1.0" encoding="utf-8"?>
 <grit-part>
 
   <message name="IDS_AUTOCOMPLETE_SEARCH_DESCRIPTION" desc="Description for the default search match.">
     <ph name="ENGINE">$1<ex>Google</ex></ph> Search
   </message>
   <message name="IDS_EMPTY_KEYWORD_VALUE" desc="Shown in the location bar drop down when the user enters a string that matches a chrome keyword, but they haven't entered any text following the chrome keyword">
     &lt;Type search term&gt;
   </message>
   <message name="IDS_LINK_FROM_CLIPBOARD" desc="The label in the omnibox dropdown explaining that the link has been extracted from the user's clipboard. [Length: 21em]">
     Link you copied
   </message>
   <message name="IDS_SECURE_CONNECTION_EV" desc="Short text shown in the location bar when the connection is secure with an EV cert.">
     <ph name="ORGANIZATION">$1<ex>Paypal Inc.</ex></ph> [<ph name="COUNTRY">$2<ex>US</ex></ph>]
   </message>
   <if expr="is_ios">
     <message name="IDS_OMNIBOX_EMPTY_HINT" desc="The text displayed in the omnibox when it is empty.">
       Search or type URL
     </message>
   </if>
+  <message name="IDS_PHYSICAL_WEB_OVERFLOW" desc="The label in the omnibox dropdown indicating that multiple nearby devices are broadcasting URLs.">
+    {URL_count, plural, =1 {1 web page found} other {# web pages found}}
+  </message>
 </grit-part>