Media Keys should not count towards the max of four shortcuts per extension.

chrome/browser/extensions/api/commands/command_service.h

Index: chrome/browser/extensions/api/commands/command_service.h
diff --git a/chrome/browser/extensions/api/commands/command_service.h b/chrome/browser/extensions/api/commands/command_service.h
index bd27746b8c4ca7d937bd10db9d6425861ee9d8c1..41c288fab5312cfbf0352f6278cb150315bb3538 100644
--- a/chrome/browser/extensions/api/commands/command_service.h
+++ b/chrome/browser/extensions/api/commands/command_service.h
@@ -78,11 +78,6 @@ class CommandService : public ProfileKeyedAPI,
   // Convenience method to get the CommandService for a profile.
   static CommandService* Get(content::BrowserContext* context);
 
-  // Return true if the specified accelerator is one of the following multimedia
-  // keys: Next Track key, Previous Track key, Stop Media key, Play/Pause Media
-  // key, without any modifiers.
-  static bool IsMediaKey(const ui::Accelerator& accelerator);
-
   // Returns true if |extension| is permitted to and does remove the bookmark
   // shortcut key.
   static bool RemovesBookmarkShortcut(const extensions::Extension* extension);