Tiny clean-up of ibus_cotroller.

chrome/browser/chromeos/input_method/ibus_controller.h

Index: chrome/browser/chromeos/input_method/ibus_controller.h
diff --git a/chrome/browser/chromeos/input_method/ibus_controller.h b/chrome/browser/chromeos/input_method/ibus_controller.h
index 9cfe2e104314d066437533eb2a329f52bf808c9a..7a76af1bab6b4806976e03f85c95ddb22445d105 100644
--- a/chrome/browser/chromeos/input_method/ibus_controller.h
+++ b/chrome/browser/chromeos/input_method/ibus_controller.h
@@ -50,6 +50,12 @@ class InputMethodDescriptor {
   static InputMethodDescriptor GetFallbackInputMethodDescriptor();
 
  private:
+  // For GetFallbackInputMethodDescriptor(). Use the public constructor instead.
+  InputMethodDescriptor(const std::string& in_id,
+                        const std::string& in_keyboard_layout,
+                        const std::string& in_virtual_keyboard_layouts,
+                        const std::string& in_language_code);
+
   // An ID that identifies an input method engine (e.g., "t:latn-post",
   // "pinyin", "hangul").
   std::string id_;