Move functions for controlling Caps Lock to CapsLockDelegate from SystemTrayDelegate.

ash/system/tray/system_tray_delegate.h

Index: ash/system/tray/system_tray_delegate.h
diff --git a/ash/system/tray/system_tray_delegate.h b/ash/system/tray/system_tray_delegate.h
index a772d92ba328e87f9b8523b89a3863dafd4fc01d..e9ab5f561d7621400167f836afb3b47017b7d4e9 100644
--- a/ash/system/tray/system_tray_delegate.h
+++ b/ash/system/tray/system_tray_delegate.h
@@ -145,12 +145,6 @@ class SystemTrayDelegate {
   // Shows help.
   virtual void ShowHelp() = 0;
 
-  // Gets whether the caps lock is on.
-  virtual bool IsCapsLockOn() const = 0;
-
-  // Sets the caps lock status to |enabled|.
-  virtual void SetCapsLockEnabled(bool enabled) = 0;
-
   // Attempts to shut down the system.
   virtual void ShutDown() = 0;