GTK: add TEXT_URI_LIST as a data type for drags from the omnibox.

chrome/browser/ui/gtk/omnibox/omnibox_view_gtk.h

 // Copyright (c) 2011 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.
 
 #ifndef CHROME_BROWSER_UI_GTK_OMNIBOX_OMNIBOX_VIEW_GTK_H_
 #define CHROME_BROWSER_UI_GTK_OMNIBOX_OMNIBOX_VIEW_GTK_H_
 #pragma once
 
 #include <gtk/gtk.h>
 
@@ skipping 528 matching lines @@
   // to track pre-edit_'s content, as it'll be treated as part of text content.
   size_t pre_edit_size_before_change_;
 #endif
 
   // The view that is going to be focused next. Only valid while handling
   // "focus-out" events.
   GtkWidget* going_to_focus_;
 
   ui::GtkSignalRegistrar signals_;
 
+  GtkTargetList* copy_targets_;
+
   DISALLOW_COPY_AND_ASSIGN(OmniboxViewGtk);
 };
 
 #endif  // CHROME_BROWSER_UI_GTK_OMNIBOX_OMNIBOX_VIEW_GTK_H_