Removes most of aura dependencies from DefaultState

ash/wm/aura/wm_root_window_controller_aura.cc

Index: ash/wm/aura/wm_root_window_controller_aura.cc
diff --git a/ash/wm/aura/wm_root_window_controller_aura.cc b/ash/wm/aura/wm_root_window_controller_aura.cc
index 5b4a8890b8d815a53190ab82a8160b097f69b237..812987591bacfe33a2b64bf21e0ca55aa3545353 100644
--- a/ash/wm/aura/wm_root_window_controller_aura.cc
+++ b/ash/wm/aura/wm_root_window_controller_aura.cc
@@ -6,6 +6,7 @@
 
 #include "ash/root_window_controller.h"
 #include "ash/wm/aura/wm_globals_aura.h"
+#include "ash/wm/workspace_controller.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_property.h"
 
@@ -57,5 +58,9 @@ WmGlobals* WmRootWindowControllerAura::GetGlobals() {
   return WmGlobalsAura::Get();
 }
 
+WorkspaceWindowState WmRootWindowControllerAura::GetWorkspaceWindowState() {
+  return root_window_controller_->workspace_controller()->GetWindowState();
+}
+
 }  // namespace wm
 }  // namespace ash