Make web content accessibility tree a descendant of main window's tree again

views/view_gtk.cc

 // 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.
 
 #include "views/view.h"
 
 #include <gtk/gtk.h>
 
 #include "base/logging.h"
 
 namespace views {
 
+gfx::NativeViewAccessible View::GetNativeViewAccessible() {
+  NOTIMPLEMENTED();
+  return NULL;
+}
+
 int View::GetHorizontalDragThreshold() {
   static bool determined_threshold = false;
   static int drag_threshold = 8;
   if (determined_threshold)
     return drag_threshold;
   determined_threshold = true;
   GtkSettings* settings = gtk_settings_get_default();
   if (!settings)
     return drag_threshold;
   int value = 0;
   g_object_get(G_OBJECT(settings), "gtk-dnd-drag-threshold", &value, NULL);
   if (value)
     drag_threshold = value;
   return drag_threshold;
 }
 
 int View::GetVerticalDragThreshold() {
   // Vertical and horizontal drag threshold are the same in Gtk.
   return GetHorizontalDragThreshold();
 }
 
 }  // namespace views