Eliminate Shell::RootWindowList in favor of aura::Window::Windows.

ash/display/output_configurator_animation.h

Index: ash/display/output_configurator_animation.h
diff --git a/ash/display/output_configurator_animation.h b/ash/display/output_configurator_animation.h
index 42a66ef861d1f5b09df35531757e040cac0a6558..f53ffa5865687eb3f3d578217c23299d817a4c68 100644
--- a/ash/display/output_configurator_animation.h
+++ b/ash/display/output_configurator_animation.h
@@ -14,6 +14,7 @@
 
 namespace aura {
 class RootWindow;

[varkha, 2014/01/06 21:06:45]

Is this still necessary?

+class Window;
 }  // namespace aura
 
 namespace ui {
@@ -54,7 +55,7 @@ class ASH_EXPORT OutputConfiguratorAnimation
   // and *not* call the registered callback.
   void ClearHidingLayers();
 
-  std::map<aura::RootWindow*, ui::Layer*> hiding_layers_;
+  std::map<aura::Window*, ui::Layer*> hiding_layers_;
   scoped_ptr<base::OneShotTimer<OutputConfiguratorAnimation> > timer_;
 
   DISALLOW_COPY_AND_ASSIGN(OutputConfiguratorAnimation);