Add localized default audio device names.

chrome/app/google_chrome_strings.grd

 <?xml version="1.0" encoding="UTF-8"?>
 <!-- This file contains definitions of strings that are specific to
 Google Chrome. These strings will be translated for each locale that Google
 Chrome supports. If you update this file, be sure also to update
 chromium_strings.grd. -->
 
 <grit base_dir="." latest_public_release="0" current_release="1"
       source_lang_id="en" enc_check="möl">
   <outputs>
     <output filename="grit/google_chrome_strings.h" type="rc_header">
@@ skipping 1295 matching lines @@
         <message name="IDS_WIN_PROMPT_TO_CLOSE_APPS_FOR_CHROMEOS"
                  desc="Modal message box prompt shown to the user after requesting to relaunch in Windows Chrome OS mode while packaged apps are running, which will require all packaged apps to be closed and then restarted. Dialog is shown with choices: OK, Cancel.">
           Relaunching in Chrome immersive mode will close and relaunch your Chrome apps.
         </message>
         <message name="IDS_WIN_PROMPT_TO_CLOSE_APPS_FOR_DESKTOP"
                  desc="Modal message box prompt shown to the user after requesting to relaunch in Desktop mode while packaged apps are running, which will require all packaged apps to be closed and then restarted. Dialog is shown with choices: OK, Cancel.">
           Relaunching in Desktop mode will close and relaunch your Chrome apps.
         </message>
       </if>
 
+      <!-- Audio device names. -->
+      <message name="IDS_DEFAULT_AUDIO_DEVICE_NAME" desc="Name representing the system default audio device (i.e. microphone or loudspeaker). This is typically presented to users in a drop-down list of device choices. Selecting it means the system will decide which device to use.">
+        Default
+      </message>
+      <if expr="is_win">
+        <message name="IDS_COMMUNICATIONS_AUDIO_DEVICE_NAME" desc="Name representing the system default communications audio device (i.e. microphone or loudspeaker). This is typically presented to users in a drop-down list of device choices. Selecting it means the system will decide which device to use for communications.">
+          Communications
+        </message>
+      </if>
+      <if expr="chromeos">
+        <message name="IDS_BEAMFORMING_ON_DEFAULT_AUDIO_INPUT_DEVICE_NAME" desc="Name representing the default audio input device (i.e. microphone), but with beamforming audio processing enabled. This is typically presented to users in a drop-down list of device choices. Selecting it means the system will decide which device to use, but with beamforming enabled. This will generally cause only the user in front of the device to be picked up by the microphones.">
+          Default (pick up just one person)
+        </message>
+        <message name="IDS_BEAMFORMING_OFF_DEFAULT_AUDIO_INPUT_DEVICE_NAME" desc="Name representing the default audio input device (i.e. microphone), but with beamforming audio processing disabled. This is typically presented to users in a drop-down list of device choices. Selecting it means the system will decide which device to use, but with beamforming disabled. This will generally cause everything in the vicinity to be picked up by the microphones.">
+          Default (pick up everything)
+        </message>
+      </if>
+
     </messages>
   </release>
 </grit>