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

views/controls/native/native_view_host_gtk.h

 // Copyright (c) 2010 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 VIEWS_CONTROLS_NATIVE_NATIVE_VIEW_HOST_GTK_H_
 #define VIEWS_CONTROLS_NATIVE_NATIVE_VIEW_HOST_GTK_H_
 #pragma once
 
 #include <gtk/gtk.h>
 #include <string>
@@ skipping 20 matching lines @@
   virtual void NativeViewAttached();
   virtual void NativeViewDetaching(bool destroyed);
   virtual void AddedToWidget();
   virtual void RemovedFromWidget();
   virtual void InstallClip(int x, int y, int w, int h);
   virtual bool HasInstalledClip();
   virtual void UninstallClip();
   virtual void ShowWidget(int x, int y, int w, int h);
   virtual void HideWidget();
   virtual void SetFocus();
+  virtual gfx::NativeViewAccessible GetNativeViewAccessible();
 
  private:
   // Create and Destroy the GtkFixed that performs clipping on our hosted
   // GtkWidget. |needs_window| is true when a clip is installed and implies the
   // fixed is backed by a X Window which actually performs the clipping.
   // It's kind of retarded that Gtk/Cairo doesn't clip painting of child windows
   // regardless of whether or not there's an X Window. It's not that hard.
   void CreateFixed(bool needs_window);
 
   // Destroys the GtkFixed that performs clipping on our hosted GtkWidget.
@@ skipping 33 matching lines @@
   // The GtkFixed that contains the attached gfx::NativeView (used for
   // clipping).
   GtkWidget* fixed_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeViewHostGtk);
 };
 
 }  // namespace views
 
 #endif  // VIEWS_CONTROLS_NATIVE_NATIVE_VIEW_HOST_GTK_H_