Fix white virtual keyboard at login screen

ui/keyboard/keyboard_controller.h

Index: ui/keyboard/keyboard_controller.h
diff --git a/ui/keyboard/keyboard_controller.h b/ui/keyboard/keyboard_controller.h
index d62306263cf4e3bba3d2c4faeee7bdbc1ef2ae30..2eb6653168784c564b8cd265585ea8deba992968 100644
--- a/ui/keyboard/keyboard_controller.h
+++ b/ui/keyboard/keyboard_controller.h
@@ -56,7 +56,8 @@ class KEYBOARD_EXPORT KeyboardController : public ui::InputMethodObserver,
     return container_.get() != NULL;
   }
 
-  // Reloads the content of the keyboard.
+  // Reloads the content of the keyboard. No-op if the keyboard content is not
+  // loaded yet.
   void Reload();
 
   // Hides virtual keyboard and notifies observer bounds change.