GTK: implement extension bookmark manager drag api....

chrome/browser/gtk/bookmark_bar_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 "chrome/browser/gtk/bookmark_bar_gtk.h"
 
 #include <vector>
 
 #include "app/gfx/canvas_paint.h"
 #include "app/gfx/text_elider.h"
@@ skipping 819 matching lines @@
   }
 }
 
 GtkWidget* BookmarkBarGtk::CreateBookmarkButton(const BookmarkNode* node) {
   GtkWidget* button = theme_provider_->BuildChromeButton();
   bookmark_utils::ConfigureButtonForNode(node, model_, button, theme_provider_);
 
   // The tool item is also a source for dragging
   gtk_drag_source_set(button, GDK_BUTTON1_MASK, NULL, 0,
       static_cast<GdkDragAction>(GDK_ACTION_MOVE | GDK_ACTION_COPY));
-  int target_mask = gtk_dnd_util::CHROME_BOOKMARK_ITEM;
-  if (node->is_url()) {
-    target_mask |= gtk_dnd_util::TEXT_URI_LIST |
-                   gtk_dnd_util::TEXT_PLAIN |
-                   gtk_dnd_util::NETSCAPE_URL;
-  }
+  int target_mask = bookmark_utils::GetCodeMask(node->is_folder());
   gtk_dnd_util::SetSourceTargetListFromCodeMask(button, target_mask);
   g_signal_connect(button, "drag-begin",
                    G_CALLBACK(&OnButtonDragBeginThunk), this);
   g_signal_connect(button, "drag-end",
                    G_CALLBACK(&OnButtonDragEndThunk), this);
   g_signal_connect(button, "drag-data-get",
                    G_CALLBACK(&OnButtonDragGetThunk), this);
   // We deliberately don't connect to "drag-data-delete" because the action of
   // moving a button will regenerate all the contents of the bookmarks bar
   // anyway.
@@ skipping 509 matching lines @@
 
   // Find the GtkWidget* for the actual target button.
   int shift = dir == GTK_MENU_DIR_PARENT ? -1 : 1;
   button_idx = (button_idx + shift + folder_list.size()) % folder_list.size();
   PopupForButton(folder_list[button_idx]);
 }
 
 void BookmarkBarGtk::CloseMenu() {
   current_context_menu_->Cancel();
 }