Refactoring display configuration state to allow generic state objects

ash/display/output_configurator_animation.cc

Index: ash/display/output_configurator_animation.cc
diff --git a/ash/display/output_configurator_animation.cc b/ash/display/output_configurator_animation.cc
index 9af743503fc0cbd5f8ec6e0d377ed5e77cc377ca..983e574d16a0022f863f98b90e29a7e481366d41 100644
--- a/ash/display/output_configurator_animation.cc
+++ b/ash/display/output_configurator_animation.cc
@@ -204,7 +204,7 @@ void OutputConfiguratorAnimation::StartFadeInAnimation() {
 }
 
 void OutputConfiguratorAnimation::OnDisplayModeChanged(
-    const std::vector<ui::OutputConfigurator::OutputSnapshot>& outputs) {
+    const ui::OutputConfigurator::DisplayStateList& outputs) {
   if (!hiding_layers_.empty())
     StartFadeInAnimation();
 }