Parse media keys for named command in the manifest.

chrome/common/extensions/docs/templates/intros/commands.html

Index: chrome/common/extensions/docs/templates/intros/commands.html
diff --git a/chrome/common/extensions/docs/templates/intros/commands.html b/chrome/common/extensions/docs/templates/intros/commands.html
index 8720da7f7de6a8745c250dfabc7921228fc33581..94db67d322f203fba96c1a8b6038318c7c043ee5 100644
--- a/chrome/common/extensions/docs/templates/intros/commands.html
+++ b/chrome/common/extensions/docs/templates/intros/commands.html
@@ -11,11 +11,13 @@ have many commands but only 4 suggested keys can be specified. The user can
 manually add more shortcuts from the chrome://extensions page.</p>
 
 <p>Supported keys: A-Z, 0-9, Comma, Period, Home, End, PageUp, PageDown, Insert,
-Delete, Tab and the arrow keys (Up, Down, Left, Right).</p>
+Delete, Tab, Arrow keys (Up, Down, Left, Right) and the Media Keys
+(MediaNextTrack, MediaPlayPause, MediaPrevTrack, MediaStop).</p>
 
 <p>Note: All key combinations must include either Ctrl* or Alt. Combinations
 that involve Ctrl+Alt are not permitted in order to avoid conflicts with the
-AltGr key. Shift can be used in addition to Alt or Ctrl, but is not required.<p>
+AltGr key. Shift can be used in addition to Alt or Ctrl, but is not required.
+Modifiers (such as Ctrl) can not be used in combination with the Media Keys.<p>
 
 <p>* Also note that on Mac 'Ctrl' is automatically converted to 'Command'. If
 you want 'Ctrl' instead, please specify 'MacCtrl'.</p>