Removes WindowState::aura_window()

ash/wm/window_state.h

Index: ash/wm/window_state.h
diff --git a/ash/wm/window_state.h b/ash/wm/window_state.h
index acc0b0e6a6ae3869a85425c23e8a49bb7db3e489..4841555f4f500305f1ec7fcf3a02625f5dac0fb7 100644
--- a/ash/wm/window_state.h
+++ b/ash/wm/window_state.h
@@ -8,7 +8,6 @@
 #include <memory>
 
 #include "ash/ash_export.h"
-#include "ash/wm/aura/wm_window_aura.h"
 #include "ash/wm/common/wm_types.h"
 #include "ash/wm/drag_details.h"
 #include "base/gtest_prod_util.h"
@@ -82,13 +81,6 @@ class ASH_EXPORT WindowState {
   // Call GetWindowState() to instantiate this class.
   ~WindowState();
 
-  // TODO(sky): remove these. They are temporary until converted to common
-  // types.
-  aura::Window* aura_window() { return WmWindowAura::GetAuraWindow(window_); }
-  const aura::Window* aura_window() const {
-    return WmWindowAura::GetAuraWindow(window_);
-  }
-
   WmWindow* window() { return window_; }
   const WmWindow* window() const { return window_; }