Webapp changes to support third party authentication

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/en-US.pak" lang="en" type="data_package"/>
     <output filename="remoting/webapp/_locales/en/messages.json" lang="en" type="chrome_messages_json"/>
     <output filename="remoting/resources/ar.pak" lang="ar" type="data_package"/>
@@ skipping 124 matching lines @@
   </translations>
   <release allow_pseudo="false" seq="1">
     <messages fallback_to_english="true">
       <if expr="pp_ifdef('_google_chrome')">
         <message desc="Message shown when the Chrome Remote Desktop client tab is closed while a connection is active." name="IDR_CLOSE_PROMPT">
           Leaving this page will end your Chrome Remote Desktop session.
         </message>
         <message desc="Text shown when the app first starts, or if the access token is invalidated, explaining the need to authorize the Chrome Remote Desktop app before use." name="IDR_DESCRIPTION_AUTHORIZE">
           To use Chrome Remote Desktop you must grant extended access permissions to your computer. You only have to do this once.
         </message>
+        <message desc="Confirmation prompt shown when a user needs to authenticate against a third party, explaining the need to authorize the Chrome Remote Desktop app to access the authentication URL." name="IDR_DESCRIPTION_THIRD_PARTY_AUTH">
+          The remote host requires you to authenticate to a third-party website. To continue, you must grant Chrome Remote Desktop additional permissions to access this address:
+        </message>
         <message desc="Description for the home screen. This is shown when the app starts up, above buttons to share or connect." name="IDR_DESCRIPTION_HOME">
           Chrome Remote Desktop allows you to securely share your computer over the Web. Both users must be running the Chrome Remote Desktop app, which can be found at <ph name="URL">$1<ex>&lt;a href=http://chrome.google.com/remotedesktop&gt;chrome.google.com/remotedesktop&lt;/a&gt;</ex></ph>.
         </message>
         <message desc="Error displayed if authentication fails. This can be caused by stale credentials, in which logging out of the web-app and retrying can fix the problem." name="IDR_ERROR_AUTHENTICATION_FAILED">
           Authentication failed. Please sign in to Chrome Remote Desktop again.
         </message>
         <message desc="Error displayed if the host or client plugin are missing or if they could not be loaded." name="IDR_ERROR_BAD_PLUGIN_VERSION">
           Some components required for Chrome Remote Desktop are missing. Please make sure you have installed the latest version and try again.
         </message>
         <message desc="Error that is shown on the client side when incompatible Chrome Remote Desktop versions are installed on host and client." name="IDR_ERROR_INCOMPATIBLE_PROTOCOL">
@@ skipping 43 matching lines @@
         </message>
       </if>
 
       <if expr="not pp_ifdef('_google_chrome')">
         <message desc="Message shown when the Chromoting client tab is closed while a connection is active." name="IDR_CLOSE_PROMPT">
           Leaving this page will end your Chromoting session.
         </message>
         <message desc="Text shown when the app first starts, or if the access token is invalidated, explaining the need to authorize the Chromoting app before use." name="IDR_DESCRIPTION_AUTHORIZE">
           To use Chromoting you must grant extended access permissions to your computer. You only have to do this once.
         </message>
+        <message desc="Confirmation prompt shown when a user needs to authenticate against a third party, explaining the need to authorize the Chromoting app to access the authentication URL." name="IDR_DESCRIPTION_THIRD_PARTY_AUTH">
+          The remote host requires you to authenticate to a third-party website. To continue, you must grant Chromoting additional permissions to access this address:
+        </message>
         <message desc="Description for the home screen. This is shown when the app starts up, above buttons to share or connect." name="IDR_DESCRIPTION_HOME">
           Chromoting allows you to securely share your computer over the Web. Both users must be running the Chromoting app, which can be found at <ph name="URL">$1<ex>&lt;a href=http://chrome.google.com/remotedesktop&gt;chrome.google.com/remotedesktop&lt;/a&gt;</ex></ph>.
         </message>
         <message desc="Error displayed if authentication fails. This can be caused by stale credentials, in which logging out of the web-app and retrying can fix the problem." name="IDR_ERROR_AUTHENTICATION_FAILED">
           Authentication failed. Please sign in to Chromoting again.
         </message>
         <message desc="Error displayed if the host or client plugin are missing or if they could not be loaded." name="IDR_ERROR_BAD_PLUGIN_VERSION">
           Some components required for Chromoting are missing. Please make sure you have installed the latest version and try again.
         </message>
         <message desc="Error that is shown on the client side when incompatible Chromoting versions are installed on host and client." name="IDR_ERROR_INCOMPATIBLE_PROTOCOL">
@@ skipping 324 matching lines @@
       </message>
       <message desc="Help link displayed when the user enables the host on this computer. Clicking this link opens a page that explains why this operation is safe. This string appears in a UI with limited horizontal space. Please try to keep translations no more than about 30 characters." name="IDR_WHY_IS_THIS_SAFE">
         Why is this safe?
       </message>
       <message desc="Survey link for users that want to take part." name="IDR_SIGN_ME_UP">
         Take the survey
       </message>
     </messages>
   </release>
 </grit>