Perform a display configuration in software mirror on hotplug event

ui/display/chromeos/update_display_configuration_task.cc

Index: ui/display/chromeos/update_display_configuration_task.cc
diff --git a/ui/display/chromeos/update_display_configuration_task.cc b/ui/display/chromeos/update_display_configuration_task.cc
index 7b254fc1e7c4f11dd636dd7b832dcdc4a954584d..33ac1feb526e0cd363abe3aee73c9cff1eef27d7 100644
--- a/ui/display/chromeos/update_display_configuration_task.cc
+++ b/ui/display/chromeos/update_display_configuration_task.cc
@@ -111,7 +111,8 @@ void UpdateDisplayConfigurationTask::OnStateEntered(
     if (!success && new_display_state_ == MULTIPLE_DISPLAY_STATE_DUAL_MIRROR) {
       if (layout_manager_->GetDisplayState() !=
               MULTIPLE_DISPLAY_STATE_DUAL_EXTENDED ||
-          layout_manager_->GetPowerState() != new_power_state_) {
+          layout_manager_->GetPowerState() != new_power_state_ ||
+          force_configure_) {
         new_display_state_ = MULTIPLE_DISPLAY_STATE_DUAL_EXTENDED;
         EnterState(base::Bind(
             &UpdateDisplayConfigurationTask::OnEnableSoftwareMirroring,