Add action for each button on opt-in IME menu.

chrome/browser/chromeos/input_method/mock_input_method_manager.cc

Index: chrome/browser/chromeos/input_method/mock_input_method_manager.cc
diff --git a/chrome/browser/chromeos/input_method/mock_input_method_manager.cc b/chrome/browser/chromeos/input_method/mock_input_method_manager.cc
index 46b038ed8ca4f11df728dbc09c1e0f6cb11de4be..b4b30873ed0f029c07828a021e996d5b66686aa5 100644
--- a/chrome/browser/chromeos/input_method/mock_input_method_manager.cc
+++ b/chrome/browser/chromeos/input_method/mock_input_method_manager.cc
@@ -255,5 +255,8 @@ void MockInputMethodManager::NotifyImeMenuItemsChanged(
 
 void MockInputMethodManager::MaybeNotifyImeMenuActivationChanged() {}
 
+void MockInputMethodManager::ShowInputViewWithUrl(
+    const std::string& appended_url) {}
+
 }  // namespace input_method
 }  // namespace chromeos