a11y: Exclude children of nested keyboard accessible controls from a11y tree.

ui/accessibility/platform/ax_platform_node_win.cc

 // Copyright 2015 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 <atlbase.h>
 #include <atlcom.h>
 #include <limits.h>
 #include <oleacc.h>
 #include <stdint.h>
 
@@ skipping 1100 matching lines @@
   if (state & (1 << ui::AX_STATE_DEFAULT))
     msaa_state |= STATE_SYSTEM_DEFAULT;
   if (state & (1 << ui::AX_STATE_EXPANDED))
     msaa_state |= STATE_SYSTEM_EXPANDED;
   if (state & (1 << ui::AX_STATE_FOCUSABLE))
     msaa_state |= STATE_SYSTEM_FOCUSABLE;
   if (state & (1 << ui::AX_STATE_HASPOPUP))
     msaa_state |= STATE_SYSTEM_HASPOPUP;
   if (state & (1 << ui::AX_STATE_HOVERED))
     msaa_state |= STATE_SYSTEM_HOTTRACKED;
-  if (state & (1 << ui::AX_STATE_INVISIBLE))
+  if (state & (1 << ui::AX_STATE_INVISIBLE) ||
+      GetData().role == ui::AX_ROLE_IGNORED) {
     msaa_state |= STATE_SYSTEM_INVISIBLE;
+  }
   if (state & (1 << ui::AX_STATE_LINKED))
     msaa_state |= STATE_SYSTEM_LINKED;
   if (state & (1 << ui::AX_STATE_OFFSCREEN))
     msaa_state |= STATE_SYSTEM_OFFSCREEN;
   if (state & (1 << ui::AX_STATE_PRESSED))
     msaa_state |= STATE_SYSTEM_PRESSED;
   if (state & (1 << ui::AX_STATE_PROTECTED))
     msaa_state |= STATE_SYSTEM_PROTECTED;
   if (state & (1 << ui::AX_STATE_READ_ONLY))
     msaa_state |= STATE_SYSTEM_READONLY;
@@ skipping 157 matching lines @@
 
   AXPlatformNodeBase* base =
       FromNativeViewAccessible(node->GetNativeViewAccessible());
   if (base && !IsDescendant(base))
     base = nullptr;
 
   return static_cast<AXPlatformNodeWin*>(base);
 }
 
 }  // namespace ui