Non-Local Join for Media Router and Presentation API

chrome/app/media_router_strings.grdp

 <?xml version="1.0" encoding="utf-8"?>
 <!-- Media Router-specific strings (included from generated_resources.grd). -->
 <grit-part>
   <!-- General -->
   <message name="IDS_MEDIA_ROUTER_TITLE" desc="Title of a dialog offering possible actions for Media Router, which enables users to mirror individual tabs or desktop as well as cast content to a device.">
     Media Router
   </message>
   <message name="IDS_MEDIA_ROUTER_SHARE_YOUR_SCREEN_TEXT" desc="Tooltip for the Media Router Action icon, which appears in the toolbar. The tooltip appears on mouseover of the icon.">
    Share your screen
   </message>
@@ skipping 67 matching lines @@
     Tab not responding. Unable to cast.
   </message>
   <message name="IDS_MEDIA_ROUTER_ISSUE_PENDING_ROUTE" desc="Title of an issue to show when the user attempts to create more than one route at a time.">
     Only one session can be created at a time.
   </message>
 
   <!-- Route Details -->
   <message name="IDS_MEDIA_ROUTER_CASTING_ACTIVITY_STATUS" desc="Label of activity status, which describes the media that is currently being casted.">
     Casting: <ph name="routeTitle">$1<ex>Video</ex></ph>
   </message>
+  <message name="IDS_MEDIA_ROUTER_JOIN_BUTTON" desc="Join button, which, on click, will join the current route.">
+    Join
+  </message>
   <message name="IDS_MEDIA_ROUTER_STOP_CASTING_BUTTON" desc="Stop casting button, which, on click, will stop the current route.">
     Stop casting
   </message>
 
   <!-- Sink List -->
   <message name="IDS_MEDIA_ROUTER_DEVICE_MISSING" desc="Link to display when no devices are found which, on click, opens a page to the Chromecast help center explaining possible reasons why no devices are detected.">
     Device missing?
   </message>
 </grit-part>