chromeos: Update update_engine D-Bus availability code.

chromeos/dbus/update_engine_client.cc

Index: chromeos/dbus/update_engine_client.cc
diff --git a/chromeos/dbus/update_engine_client.cc b/chromeos/dbus/update_engine_client.cc
index 2abd1b02ab316b2b58f840494d02327486be7447..b2ae229eab9d02b940990aa22b1c3567415965d8 100644
--- a/chromeos/dbus/update_engine_client.cc
+++ b/chromeos/dbus/update_engine_client.cc
@@ -231,18 +231,20 @@ class UpdateEngineClientImpl : public UpdateEngineClient {
         base::Bind(&UpdateEngineClientImpl::StatusUpdateConnected,
                    weak_ptr_factory_.GetWeakPtr()));
     update_engine_proxy_->WaitForServiceToBeAvailable(
-        base::Bind(&UpdateEngineClientImpl::OnProxyAvailabilityChanged,
+        base::Bind(&UpdateEngineClientImpl::OnServiceInitiallyAvailable,
                    weak_ptr_factory_.GetWeakPtr()));
   }
 
  private:
-  void OnProxyAvailabilityChanged(bool service_is_available) {
+  void OnServiceInitiallyAvailable(bool service_is_available) {
     if (service_is_available) {
       // Get update engine status for the initial status. Update engine won't
       // send StatusUpdate signal unless there is a status change. If chrome
       // crashes after UPDATE_STATUS_UPDATED_NEED_REBOOT status is set,
       // restarted chrome would not get this status. See crbug.com/154104.
       GetUpdateEngineStatus();
+    } else {
+      LOG(ERROR) << "Failed to wait for D-Bus service to become available";
     }
   }