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

views/controls/native/native_view_host_win.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/controls/native/native_view_host_win.h"
 
+#include <oleacc.h>
+
 #include "base/logging.h"
 #include "ui/gfx/canvas.h"
 #include "views/controls/native/native_view_host.h"
 #include "views/focus/focus_manager.h"
 #include "views/widget/native_widget.h"
 #include "views/widget/root_view.h"
 #include "views/widget/widget.h"
 
 namespace views {
 
@@ skipping 99 matching lines @@
   // it.
   SetWindowPos(host_->native_view(), 0, 0, 0, 0, 0,
                SWP_HIDEWINDOW | SWP_NOSIZE | SWP_NOMOVE | SWP_NOZORDER |
                SWP_NOREDRAW | SWP_NOOWNERZORDER);
 }
 
 void NativeViewHostWin::SetFocus() {
   ::SetFocus(host_->native_view());
 }
 
+gfx::NativeViewAccessible NativeViewHostWin::GetNativeViewAccessible() {
+  HWND hwnd = host_->native_view();
+  if (!IsWindow(hwnd))
+    return NULL;
+
+  LRESULT ret = SendMessage(hwnd, WM_GETOBJECT, 0, OBJID_CLIENT);
+  IAccessible* accessible = NULL;
+  HRESULT success = ObjectFromLresult(
+      ret, IID_IDispatch, 0, reinterpret_cast<void**>(accessible));
+  if (success == S_OK) {
+    return accessible;
+  } else {
+    return NULL;
+  }
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // NativeViewHostWrapper, public:
 
 // static
 NativeViewHostWrapper* NativeViewHostWrapper::CreateWrapper(
     NativeViewHost* host) {
   return new NativeViewHostWin(host);
 }
 
 }  // namespace views