[AppRemoting] Implement ConnectionDroppedDialog.

remoting/resources/remoting_strings.grd

 <?xml version="1.0" encoding="UTF-8"?>
 
 <grit base_dir="." current_release="1" enc_check="möl" latest_public_release="0" source_lang_id="en">
   <outputs>
     <output filename="remoting/base/string_resources.h" type="rc_header">
       <emit emit_type="prepend"/>
     </output>
 
     <output filename="remoting/resources/am.pak" lang="am" type="data_package"/>
     <output filename="remoting/resources/ar.pak" lang="ar" type="data_package"/>
@@ skipping 545 matching lines @@
       </message>
       <message desc="Message shown if the user has been idle for a long time, informing them that their session will be disconnected shortly." name="IDS_IDLE_TIMEOUT_WARNING">
         Your <ph name="APPLICATION_NAME">$1<ex>SampleApp Streaming</ex></ph> session has been inactive for a while and will be disconnected shortly.
       </message>
       <message desc="Button to allow the user to indicate that they are still using the service" name="IDS_IDLE_CONTINUE">
         Continue
       </message>
       <message desc="Button to allow the user to indicate that they are no longer using the service." name="IDS_IDLE_DISCONNECT">
         Disconnect now
       </message>
+      <message desc="Button to restart the app after the connection is dropped." name="IDS_RESTART_BUTTON">
+        Restart
+      </message>
+      <message desc="Message show to the user when the connection is dropped." name="IDS_ERROR_CONNECTION_DROPPED">
+        Connection to the remote server has been lost.  This app is not available offline.
+      </message>
 
       <if expr="is_android or is_ios">
         <message desc="Button to show or hide the on-screen keyboard." name="IDS_SHOW_HIDE_KEYBOARD" formatter_data="android_java">
           Show/hide keyboard.
         </message>
         <message desc="Message displayed to the user if there are no hosts registered to their account" name="IDS_HOST_LIST_EMPTY_ANDROID" formatter_data="android_java">
           You have no computers registered.
         </message>
         <message desc="Message displayed to the user if there are no hosts registered to their account. This is styled to look like a hyperlink. When a user activates the link, they are taken to a web page that explains how to set up a Chromoting host." name="IDS_HOST_SETUP_LINK_ANDROID" formatter_data="android_java">
           Learn how to set up a computer for remote access.
@@ skipping 553 matching lines @@
       <message desc="Label for the button to decline sharing the computer in 'It2Me' mode." name="IDS_SHARE_CONFIRM_DIALOG_DECLINE" >
         Cancel
       </message>
       <message desc="Text shown in tooltip to inform the user that a setting is managed by domain policy." name="IDS_SETTING_MANAGED_BY_POLICY">
         This setting is managed by your domain policy.
       </message>
 
     </messages>
   </release>
 </grit>