Move shadow code to views\corewm

ash/drag_drop/drag_image_view.cc

Index: ash/drag_drop/drag_image_view.cc
===================================================================
--- ash/drag_drop/drag_image_view.cc	(revision 167688)
+++ ash/drag_drop/drag_image_view.cc	(working copy)
@@ -4,8 +4,8 @@
 
 #include "ash/drag_drop/drag_image_view.h"
 
-#include "ash/wm/shadow_types.h"
 #include "ui/aura/window.h"
+#include "ui/views/corewm/shadow_types.h"
 #include "ui/views/widget/widget.h"
 
 namespace ash {
@@ -25,7 +25,7 @@
   drag_widget->Init(params);
   drag_widget->SetOpacity(0xFF);
   drag_widget->GetNativeWindow()->set_owned_by_parent(false);
-  SetShadowType(drag_widget->GetNativeView(), SHADOW_TYPE_NONE);
+  SetShadowType(drag_widget->GetNativeView(), views::corewm::SHADOW_TYPE_NONE);
   return drag_widget;
 }
 }