Move functions for controlling Caps Lock to CapsLockDelegate from SystemTrayDelegate.

ash/system/status_area_widget.cc

Index: ash/system/status_area_widget.cc
diff --git a/ash/system/status_area_widget.cc b/ash/system/status_area_widget.cc
index 246433f31df05d9107cb9739fe681f7582556b04..13f828d48d8ef2f84c3acf8c931d93a14be50b33 100644
--- a/ash/system/status_area_widget.cc
+++ b/ash/system/status_area_widget.cc
@@ -125,14 +125,6 @@ class DummySystemTrayDelegate : public SystemTrayDelegate {
   virtual void ShowHelp() OVERRIDE {
   }
 
-  virtual bool IsCapsLockOn() const OVERRIDE {
-    return caps_lock_enabled_;
-  }
-
-  virtual void SetCapsLockEnabled(bool enabled) OVERRIDE {
-    caps_lock_enabled_ = enabled;
-  }
-
   virtual void ShutDown() OVERRIDE {
     MessageLoop::current()->Quit();
   }