Adds DisplayErrorDialog to show the error message of the failure of mirroring to the users.

ash/display/output_configurator_animation.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/display/output_configurator_animation.h"
 
+#include "ash/display/display_error_dialog.h"
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
 #include "base/bind.h"
 #include "base/stl_util.h"
 #include "base/time.h"
 #include "ui/aura/root_window.h"
 #include "ui/aura/window.h"
 #include "ui/compositor/layer.h"
 #include "ui/compositor/layer_animation_observer.h"
 #include "ui/compositor/layer_animation_sequence.h"
@@ skipping 185 matching lines @@
 }
 
 void OutputConfiguratorAnimation::OnDisplayModeChanged() {
   if (!hiding_layers_.empty())
     StartFadeInAnimation();
 }
 
 void OutputConfiguratorAnimation::OnDisplayModeChangeFailed() {
   if (!hiding_layers_.empty())
     StartFadeInAnimation();
+  DisplayErrorDialog::ShowDialog();
 }
 
 void OutputConfiguratorAnimation::ClearHidingLayers() {
   if (timer_.get()) {
     timer_->Stop();
     timer_.reset();
   }
   STLDeleteContainerPairSecondPointers(
       hiding_layers_.begin(), hiding_layers_.end());
   hiding_layers_.clear();
 }
 
 }  // namespace internal
 }  // namespace ash