Add WindowPinType property on arua::Window

ash/common/wm_window.h

Index: ash/common/wm_window.h
diff --git a/ash/common/wm_window.h b/ash/common/wm_window.h
index 3711ec655f2932baa27d3b138f348909034ded54..fced3821b98fa46b4336b969062d919f05a5d1fa 100644
--- a/ash/common/wm_window.h
+++ b/ash/common/wm_window.h
@@ -13,6 +13,7 @@
 #include "base/observer_list.h"
 #include "base/strings/string16.h"
 #include "base/time/time.h"
+#include "ui/aura/client/aura_constants.h"
 #include "ui/aura/window_observer.h"
 #include "ui/base/ui_base_types.h"
 #include "ui/compositor/layer_animation_element.h"
@@ -250,6 +251,9 @@ class ASH_EXPORT WmWindow : public aura::WindowObserver,
   void SetShowState(ui::WindowShowState show_state);
   ui::WindowShowState GetShowState() const;
 
+  void SetPinType(aura::client::WindowPinType type);
+  aura::client::WindowPinType GetPinType() const;
+
   void SetPreMinimizedShowState(ui::WindowShowState show_state);
   ui::WindowShowState GetPreMinimizedShowState() const;
   void SetPreFullscreenShowState(ui::WindowShowState show_state);