Make limitations for input.ime.sendKeyEvents API.

ui/base/ime/mock_input_method.h

Index: ui/base/ime/mock_input_method.h
diff --git a/ui/base/ime/mock_input_method.h b/ui/base/ime/mock_input_method.h
index 96d2c47f3444bca616b4868f9aabc61443a3ca14..2694bbf582c6fcc5c246a4ab38399b50e3daa6b5 100644
--- a/ui/base/ime/mock_input_method.h
+++ b/ui/base/ime/mock_input_method.h
@@ -54,10 +54,16 @@ class UI_BASE_IME_EXPORT MockInputMethod
   void RemoveObserver(InputMethodObserver* observer) override;
 
  private:
+  // InputMethod:
+  const std::vector<std::unique_ptr<ui::KeyEvent>>& GetKeyEventsForTesting()
+      override;
+
   TextInputClient* text_input_client_;
   base::ObserverList<InputMethodObserver> observer_list_;
   internal::InputMethodDelegate* delegate_;
 
+  std::vector<std::unique_ptr<ui::KeyEvent>> key_events_for_testing_;
+
   DISALLOW_COPY_AND_ASSIGN(MockInputMethod);
 };