Move more dnd related files to ui/base

app/drag_drop_types_gtk.cc

-// Copyright (c) 2009 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "app/drag_drop_types.h"
-
-#include <gtk/gtk.h>
-
-// static
-int DragDropTypes::DragOperationToGdkDragAction(int drag_operation) {
-  int gdk_drag_action = 0;
-  if (drag_operation & DRAG_MOVE)
-    gdk_drag_action |= GDK_ACTION_MOVE;
-  if (drag_operation & DRAG_COPY)
-    gdk_drag_action |= GDK_ACTION_COPY;
-  if (drag_operation & DRAG_LINK)
-    gdk_drag_action |= GDK_ACTION_LINK;
-  return gdk_drag_action;
-}
-
-// static
-int DragDropTypes::GdkDragActionToDragOperation(int gdk_drag_action) {
-  int drag_operation = DRAG_NONE;
-  if (gdk_drag_action & GDK_ACTION_COPY)
-    drag_operation |= DRAG_COPY;
-  if (gdk_drag_action & GDK_ACTION_MOVE)
-    drag_operation |= DRAG_MOVE;
-  if (gdk_drag_action & GDK_ACTION_LINK)
-    drag_operation |= DRAG_LINK;
-  return drag_operation;
-}