Add Fade-out/Fade-in animation during output-configuration change.

ash/shell.cc

Index: ash/shell.cc
diff --git a/ash/shell.cc b/ash/shell.cc
index 535b3a46d6f6d9df44ca075a5c1e8f1fc869514d..f5b2a764a193b59372cab53465af1397d393a3f0 100644
--- a/ash/shell.cc
+++ b/ash/shell.cc
@@ -98,6 +98,7 @@
 #endif
 
 #if defined(OS_CHROMEOS)
+#include "ash/display/output_configurator_animation.h"
 #include "chromeos/display/output_configurator.h"
 #include "ui/aura/dispatcher_linux.h"
 #endif  // defined(OS_CHROMEOS)
@@ -189,6 +190,8 @@ Shell::Shell(ShellDelegate* delegate)
   ui_controls::InstallUIControlsAura(internal::CreateUIControls());
 #if defined(OS_CHROMEOS)
   // OutputConfigurator needs to get events regarding added/removed outputs.
+  output_configurator_->set_animation_delegate(
+      new internal::OutputConfiguratorAnimation);
   static_cast<aura::DispatcherLinux*>(
       aura::Env::GetInstance()->GetDispatcher())->AddDispatcherForRootWindow(
           output_configurator());