Wires up drag/drop for aura-mus

ui/aura/client/drag_drop_delegate.h

Index: ui/aura/client/drag_drop_delegate.h
diff --git a/ui/wm/public/drag_drop_delegate.h b/ui/aura/client/drag_drop_delegate.h
similarity index 92%
rename from ui/wm/public/drag_drop_delegate.h
rename to ui/aura/client/drag_drop_delegate.h
index 50f6c267686951a66d9b99c0f7d9820f1dd4808e..dde7f32ec73ca3161bf5379b93e6461ef8b31bd0 100644
--- a/ui/wm/public/drag_drop_delegate.h
+++ b/ui/aura/client/drag_drop_delegate.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef UI_WM_PUBLIC_DRAG_DROP_DELEGATE_H_
-#define UI_WM_PUBLIC_DRAG_DROP_DELEGATE_H_
+#ifndef UI_AURA_CLIENT_DRAG_DROP_DELEGATE_H_
+#define UI_AURA_CLIENT_DRAG_DROP_DELEGATE_H_
 
 #include "ui/aura/aura_export.h"
 
@@ -48,4 +48,4 @@ AURA_EXPORT DragDropDelegate* GetDragDropDelegate(Window* window);
 }  // namespace client
 }  // namespace aura
 
-#endif  // UI_WM_PUBLIC_DRAG_DROP_DELEGATE_H_
+#endif  // UI_AURA_CLIENT_DRAG_DROP_DELEGATE_H_