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

views/controls/native/native_view_host_wrapper.h

Index: views/controls/native/native_view_host_wrapper.h
===================================================================
--- views/controls/native/native_view_host_wrapper.h	(revision 88807)
+++ views/controls/native/native_view_host_wrapper.h	(working copy)
@@ -6,6 +6,8 @@
 #define VIEWS_CONTROLS_NATIVE_NATIVE_VIEW_HOST_WRAPPER_H_
 #pragma once
 
+#include "ui/gfx/native_widget_types.h"
+
 namespace views {
 
 class NativeViewHost;
@@ -56,6 +58,10 @@
   // Sets focus to the gfx::NativeView.
   virtual void SetFocus() = 0;
 
+  // Return the native view accessible corresponding to the wrapped native
+  // view.
+  virtual gfx::NativeViewAccessible GetNativeViewAccessible() = 0;
+
   // Creates a platform-specific instance of an object implementing this
   // interface.
   static NativeViewHostWrapper* CreateWrapper(NativeViewHost* host);