Tests covering additional screens of reset-Rollback option added.

chromeos/dbus/fake_update_engine_client.cc

Index: chromeos/dbus/fake_update_engine_client.cc
diff --git a/chromeos/dbus/fake_update_engine_client.cc b/chromeos/dbus/fake_update_engine_client.cc
index 76a21492e10fbff98835bc2bf0b78899d2b26fcd..e0c46a4efdac19d92224c85efb08395622deedb1 100644
--- a/chromeos/dbus/fake_update_engine_client.cc
+++ b/chromeos/dbus/fake_update_engine_client.cc
@@ -21,9 +21,11 @@ void FakeUpdateEngineClient::Init(dbus::Bus* bus) {
 }
 
 void FakeUpdateEngineClient::AddObserver(Observer* observer) {
+  observers_.AddObserver(observer);
 }
 
 void FakeUpdateEngineClient::RemoveObserver(Observer* observer) {
+  observers_.RemoveObserver(observer);
 }
 
 bool FakeUpdateEngineClient::HasObserver(Observer* observer) {
@@ -58,6 +60,11 @@ UpdateEngineClient::Status FakeUpdateEngineClient::GetLastStatus() {
   return last_status;
 }
 
+void FakeUpdateEngineClient::NotifyObserversThatStatusChanged(
+    const UpdateEngineClient::Status& status) {
+  FOR_EACH_OBSERVER(Observer, observers_, UpdateStatusChanged(status));
+}
+
 void FakeUpdateEngineClient::SetChannel(const std::string& target_channel,
                                         bool is_powerwash_allowed) {
 }