Show the Managed Bookmarks folder in the views UI.

chrome/browser/ui/bookmarks/bookmark_drag_drop.cc

 // Copyright 2013 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 "chrome/browser/ui/bookmarks/bookmark_drag_drop.h"
 
 #include "chrome/browser/bookmarks/bookmark_model_factory.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/undo/bookmark_undo_service.h"
 #include "chrome/browser/undo/bookmark_undo_service_factory.h"
+#include "components/bookmarks/browser/bookmark_client.h"
 #include "components/bookmarks/browser/bookmark_model.h"
 #include "components/bookmarks/browser/bookmark_node_data.h"
 #include "components/bookmarks/browser/bookmark_utils.h"
 #include "components/bookmarks/browser/scoped_group_bookmark_actions.h"
 #include "ui/base/dragdrop/drag_drop_types.h"
 
 namespace chrome {
 
 int DropBookmarks(Profile* profile,
                   const BookmarkNodeData& data,
                   const BookmarkNode* parent_node,
-                  int index) {
+                  int index,
+                  bool copy) {
   BookmarkModel* model = BookmarkModelFactory::GetForProfile(profile);
 #if !defined(OS_ANDROID)
   bookmarks::ScopedGroupBookmarkActions group_drops(model);
 #endif
   if (data.IsFromProfilePath(profile->GetPath())) {
     const std::vector<const BookmarkNode*> dragged_nodes =
         data.GetNodes(model, profile->GetPath());
+    DCHECK(model->client()->CanBeEditedByUser(parent_node));
+    DCHECK(copy || model->client()->AllCanBeEditedByUser(dragged_nodes));
     if (!dragged_nodes.empty()) {
-      // Drag from same profile. Move nodes.
+      // Drag from same profile. Copy or move nodes.
       for (size_t i = 0; i < dragged_nodes.size(); ++i) {
-        model->Move(dragged_nodes[i], parent_node, index);
+        if (copy) {
+          model->Copy(dragged_nodes[i], parent_node, index);
+        } else {
+          model->Move(dragged_nodes[i], parent_node, index);
+        }
         index = parent_node->GetIndexOf(dragged_nodes[i]) + 1;
       }
-      return ui::DragDropTypes::DRAG_MOVE;
+      return copy ? ui::DragDropTypes::DRAG_COPY : ui::DragDropTypes::DRAG_MOVE;
     }
     return ui::DragDropTypes::DRAG_NONE;
   }
   // Dropping a folder from different profile. Always accept.
   bookmark_utils::CloneBookmarkNode(model, data.elements, parent_node,
                                     index, true);
   return ui::DragDropTypes::DRAG_COPY;
 }
 
 }  // namespace chrome