[cros] update screen re-factoring pt.1

chrome/browser/chromeos/login/wizard_screen.h

Index: chrome/browser/chromeos/login/wizard_screen.h
diff --git a/chrome/browser/chromeos/login/wizard_screen.h b/chrome/browser/chromeos/login/wizard_screen.h
index c59679a34adadbf1edb1dd3804618bf84d3db4e9..159cdf2862429269e9b5e0f0862e16eeba6db1c9 100644
--- a/chrome/browser/chromeos/login/wizard_screen.h
+++ b/chrome/browser/chromeos/login/wizard_screen.h
@@ -6,8 +6,6 @@
 #define CHROME_BROWSER_CHROMEOS_LOGIN_WIZARD_SCREEN_H_
 #pragma once
 
-#include "ui/gfx/canvas.h"
-
 class WizardScreen;
 namespace chromeos {
 class ScreenObserver;
@@ -52,9 +50,6 @@ class WizardScreen {
 
   WizardScreenDelegate* delegate() { return delegate_; }
 
-  // Refreshes screen state. Should be called after view is made visible.
-  virtual void Refresh() = 0;
-
  private:
   WizardScreenDelegate* delegate_;
 };