Add OVERRIDE to chrome/browser/chromeos/.

chrome/browser/chromeos/login/update_screen.h

Index: chrome/browser/chromeos/login/update_screen.h
diff --git a/chrome/browser/chromeos/login/update_screen.h b/chrome/browser/chromeos/login/update_screen.h
index c84a61dbe4aeee8f9f3c75f00ad723720a2ec3a6..d24edd5cbd8532130972202394827e63cb43c26a 100644
--- a/chrome/browser/chromeos/login/update_screen.h
+++ b/chrome/browser/chromeos/login/update_screen.h
@@ -8,6 +8,7 @@
 
 #include <set>
 
+#include "base/compiler_specific.h"
 #include "base/gtest_prod_util.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/timer.h"
@@ -30,9 +31,9 @@ class UpdateScreen: public UpdateLibrary::Observer,
   virtual ~UpdateScreen();
 
   // Overridden from WizardScreen.
-  virtual void PrepareToShow();
-  virtual void Show();
-  virtual void Hide();
+  virtual void PrepareToShow() OVERRIDE;
+  virtual void Show() OVERRIDE;
+  virtual void Hide() OVERRIDE;
 
   // UpdateScreenActor::Delegate implementation:
   virtual void CancelUpdate() OVERRIDE;
@@ -61,7 +62,8 @@ class UpdateScreen: public UpdateLibrary::Observer,
   virtual void ExitUpdate(ExitReason reason);
 
   // UpdateLibrary::Observer implementation:
-  virtual void UpdateStatusChanged(const UpdateLibrary::Status& status);
+  virtual void UpdateStatusChanged(
+      const UpdateLibrary::Status& status) OVERRIDE;
 
  private:
   FRIEND_TEST_ALL_PREFIXES(UpdateScreenTest, TestBasic);