Parse media keys for named command in the manifest.

ui/base/strings/ui_strings.grd

Index: ui/base/strings/ui_strings.grd
diff --git a/ui/base/strings/ui_strings.grd b/ui/base/strings/ui_strings.grd
index e412ed649924dac4001112cc6790af55458d8935..8a087dd8b0fe5b859a1e3ac970cffd972c540787 100644
--- a/ui/base/strings/ui_strings.grd
+++ b/ui/base/strings/ui_strings.grd
@@ -1458,6 +1458,18 @@ need to be translated for each locale.-->
       <message name="IDS_APP_PERIOD_KEY" desc="Period key">
         Period
       </message>
+      <message name="IDS_APP_MEDIA_NEXT_TRACK_KEY" desc="Media next track key">
+        Media Next Track

[sky, 2013/09/03 15:59:34]

I don't think these should be title case either, eg 'Media next track'

[Finnur, 2013/09/03 16:04:29]

All of these are upper case. See above (Left Arrow, Up Arrow, PgUp, etc).

[sky, 2013/09/03 16:27:33]

Oh the irony. All the ones after this aren't. I guess the are a different type
though.

+      </message>
+      <message name="IDS_APP_MEDIA_PLAY_PAUSE_KEY" desc="Media play pause key">
+        Media Play/Pause
+      </message>
+      <message name="IDS_APP_MEDIA_PREV_TRACK_KEY" desc="Media previous track key">
+        Media Previous Track
+      </message>
+      <message name="IDS_APP_MEDIA_STOP_KEY" desc="Media stop key">
+        Media Stop
+      </message>
 
       <!-- Shortcut Modifiers -->
       <message name="IDS_APP_CONTROL_MODIFIER" desc="Control key shortcut modifier">