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

views/controls/native/native_view_host_win.cc

Index: views/controls/native/native_view_host_win.cc
===================================================================
--- views/controls/native/native_view_host_win.cc	(revision 88807)
+++ views/controls/native/native_view_host_win.cc	(working copy)
@@ -4,6 +4,8 @@
 
 #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"
@@ -123,6 +125,22 @@
   ::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: