Add localized default audio device names.

chrome/app/chromium_strings.grd

Index: chrome/app/chromium_strings.grd
diff --git a/chrome/app/chromium_strings.grd b/chrome/app/chromium_strings.grd
index 9548ce9348f14517916f99f9eb5dc50a71d4a1e1..77533c5c75d7084b0fadb9ef1a24c2c6a242b3d5 100644
--- a/chrome/app/chromium_strings.grd
+++ b/chrome/app/chromium_strings.grd
@@ -1311,6 +1311,24 @@ and incorrect credentials. Either an attacker is trying to pretend to be <ph nam
         </message>
       </if>
 
+      <!-- Audio device strings. -->
+      <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>

[Nico, 2015/09/15 00:12:25]

chromium_strings.grd / google_chrome_strings.grd are for strings that contain
the text "chromium" / "chrome". This doesn't seem to be the case here; these
should instead be in chrome/app/generated_resources.grd (or one of the grdp
files included there, if any is a better match) instead?

[ajm, 2015/09/15 00:52:14]

Ah, that makes more sense. Done.

+      <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>