cros: Fix various small issues with cast tray entry.

ash/ash_strings.grd

 <?xml version="1.0" encoding="UTF-8"?>
 
 <!--
 This file contains the strings for ash.
 -->
 
 <grit base_dir="." latest_public_release="0" current_release="1"
       output_all_resource_defines="false" source_lang_id="en" enc_check="möl">
   <outputs>
     <output filename="grit/ash_strings.h" type="rc_header">
@@ skipping 208 matching lines @@
       <message name="IDS_ASH_STATUS_TRAY_MESSAGE_OUT_OF_USERS" desc="The error message when all the users are added into multi-profile session.">
         All available users have already been added to this session.
       </message>
 
       <message name="IDS_ASH_STATUS_TRAY_CAST" desc="The label used as the header in the cast popup.">
         Cast screen
       </message>
       <message name="IDS_ASH_STATUS_TRAY_CAST_CAST_DESKTOP" desc="The label used in the tray popup to tell the user we are casting the desktop.">
         Casting screen to <ph name="RECEIVER_NAME">$1<ex>Living Room</ex></ph>
       </message>
+      <message name="IDS_ASH_STATUS_TRAY_CAST_CAST_DESKTOP_ACCESSIBILITY_STOP" desc="Stop button accessibility label used in the tray popup to tell the user to stop a cast to the desktop.">
+        Stop casting screen to <ph name="RECEIVER_NAME">$1<ex>Living Room</ex></ph>
+      </message>
       <message name="IDS_ASH_STATUS_TRAY_CAST_CAST_TAB" desc="The title label used in the tray popup to tell the user we are casting a tab.">
         Casting <ph name="TAB_NAME">$1<ex>YouTube</ex></ph> to <ph name="RECEIVER_NAME">$2<ex>Living Room</ex></ph>
       </message>
+      <message name="IDS_ASH_STATUS_TRAY_CAST_CAST_TAB_ACCESSIBILITY_STOP" desc="Stop button accessibility label used in the tray popup to tell the user to stop a tab cast.">
+        Stop casting <ph name="TAB_NAME">$1<ex>YouTube</ex></ph> to <ph name="RECEIVER_NAME">$2<ex>Living Room</ex></ph>
+      </message>
       <message name="IDS_ASH_STATUS_TRAY_CAST_CAST_UNKNOWN" desc="The label used when we have detected we are casting but do not know what we are casting or who we are casting to.">
         Casting to an unknown receiver
       </message>
+      <message name="IDS_ASH_STATUS_TRAY_CAST_CAST_UNKNOWN_ACCESSIBILITY_STOP" desc="Stop button accessibility label used in the tray popup to tell the user to stop a cast, but we do not know what we are casting or who we are casting to.">
+        Stop casting to an unknown receiver
+      </message>
       <message name="IDS_ASH_STATUS_TRAY_CAST_DESKTOP" desc="The label used in the tray popup to notify that desktop may be cast.">
         Cast devices available
       </message>
       <message name="IDS_ASH_STATUS_TRAY_CAST_NO_DEVICE" desc="The label used in the tray popup to notify that no cast devices are available.">
         No cast devices
       </message>
       <message name="IDS_ASH_STATUS_TRAY_CAST_OPTIONS" desc="The label used in the tray popup to manage cast options.">
         Options
       </message>
       <message name="IDS_ASH_STATUS_TRAY_CAST_STOP" desc="The label used in the tray popup to stop casting.">
@@ skipping 187 matching lines @@
 
       <!-- ChromeOS-specific strings -->
       <if expr="chromeos">
         <part file="ash_chromeos_strings.grdp" />
       </if>
 
     </messages>
   </release>
 </grit>