Media indicator for background recording task

ash/ash_chromeos_strings.grdp

 <?xml version="1.0" encoding="utf-8"?>
 <!-- ChromeOS-specific strings (included from ash_strings.grd).
      Everything in this file is wrapped in <if expr="chromeos">. -->
 <grit-part>
 
   <!-- Status tray charging strings. -->
   <message name="IDS_ASH_STATUS_TRAY_LOW_POWER_CHARGER_TITLE" desc="The title of a notification indicating that a low-current USB charger has been connected.">
     Low-power charger connected
   </message>
   <message name="IDS_ASH_STATUS_TRAY_LOW_POWER_CHARGER_MESSAGE" desc="The message body of a notification indicating that a low-current USB charger has been connected.">
@@ skipping 287 matching lines @@
   </message>
   <message name="IDS_CHROMEOS_NETWORK_ERROR_UNRECOGNIZED" desc="Network error details in notifications: Unrecognized">
     Unrecognized error
   </message>
 
   <!-- Status tray screen capture strings. -->
   <message name="IDS_ASH_STATUS_TRAY_SCREEN_CAPTURE_STOP" desc="label used for screen capture stop button">
     Stop
   </message>
 
+  <!-- Status tray media recording state strings. -->
+  <message name="IDS_ASH_STATUS_TRAY_MEDIA_RECORDING_AUDIO" desc="label used to indicate that the microphone is used by a background user">
+    Micropohne is in use.
+  </message>
+  <message name="IDS_ASH_STATUS_TRAY_MEDIA_RECORDING_VIDEO" desc="label used to indicate that the camera is used by a background user">
+    Camera is in use.
+  </message>
+  <message name="IDS_ASH_STATUS_TRAY_MEDIA_RECORDING_AUDIO_VIDEO" desc="label used to indicate that the camera and microphone are used by a background user">
+    Camera and microphone are in use.
+  </message>
+
   <!-- Status tray screen share strings. -->
   <message name="IDS_ASH_STATUS_TRAY_SCREEN_SHARE_STOP" desc="label used for screen sharing stop button">
     Stop
   </message>
   <message name="IDS_ASH_STATUS_TRAY_SCREEN_SHARE_BEING_HELPED" desc="label for screen sharing notification">
     Sharing control of your screen via Hangouts.
   </message>
   <message name="IDS_ASH_STATUS_TRAY_SCREEN_SHARE_BEING_HELPED_NAME" desc="label for screen sharing notification with name">
     Sharing control of your screen with <ph name="HELPER_NAME">$1<ex>Walder Frey</ex></ph> via Hangouts.
   </message>
@@ skipping 17 matching lines @@
 
   <message name="IDS_ASH_STATUS_TRAY_AUDIO_BLUETOOTH_DEVICE" desc="label used for bluetooth audio device">
     <ph name="device_name">$1<ex>Headphone</ex></ph> (Bluetooth)
   </message>
 
   <message name="IDS_ASH_STATUS_TRAY_AUDIO_HDMI_DEVICE" desc="label used for hdmi audio device">
     <ph name="device_name">$1<ex>Speaker</ex></ph> (HDMI)
   </message>
 
 </grit-part>