Allow link drags from the star, bookmarks bar, and bookmark bar menus

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/gtk_util.h"
 #include "app/gfx/canvas_paint.h"
@@ skipping 739 matching lines @@
 
     SetOverflowButtonAppearance();
   }
 }
 
 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, GDK_ACTION_MOVE);
+  gtk_drag_source_set(button, GDK_BUTTON1_MASK, NULL, 0,
+      static_cast<GdkDragAction>(GDK_ACTION_MOVE | GDK_ACTION_COPY));
   int target_mask = GtkDndUtil::CHROME_BOOKMARK_ITEM;
-  if (node->is_url())
-    target_mask |= GtkDndUtil::TEXT_URI_LIST | GtkDndUtil::TEXT_PLAIN;
+  if (node->is_url()) {
+    target_mask |= GtkDndUtil::TEXT_URI_LIST |
+                   GtkDndUtil::TEXT_PLAIN |
+                   GtkDndUtil::NETSCAPE_URL;
+  }
   GtkDndUtil::SetSourceTargetListFromCodeMask(button, target_mask);
   g_signal_connect(G_OBJECT(button), "drag-begin",
                    G_CALLBACK(&OnButtonDragBegin), this);
   g_signal_connect(G_OBJECT(button), "drag-end",
                    G_CALLBACK(&OnButtonDragEnd), this);
   g_signal_connect(G_OBJECT(button), "drag-data-get",
                    G_CALLBACK(&OnButtonDragGet), 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 503 matching lines @@
       break;
     }
   }
   DCHECK_NE(button_idx, -1);
 
   // 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]);
 }