Show the Managed Bookmarks folder in the views UI.

chrome/browser/ui/bookmarks/bookmark_drag_drop.cc

Index: chrome/browser/ui/bookmarks/bookmark_drag_drop.cc
diff --git a/chrome/browser/ui/bookmarks/bookmark_drag_drop.cc b/chrome/browser/ui/bookmarks/bookmark_drag_drop.cc
index ba5f05d90d1b47a007218ad33c24be95889b1c3a..e5bc4e439f5348e9bd2af69deb9019034140bf8b 100644
--- a/chrome/browser/ui/bookmarks/bookmark_drag_drop.cc
+++ b/chrome/browser/ui/bookmarks/bookmark_drag_drop.cc
@@ -8,6 +8,7 @@
 #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"
@@ -19,7 +20,8 @@ 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);
@@ -27,13 +29,19 @@ int DropBookmarks(Profile* profile,
   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;
   }