diff -r 000000000000 -r 6474c204b198 accessible/src/base/Filters.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/accessible/src/base/Filters.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,60 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "Filters.h"
+
+#include "Accessible-inl.h"
+#include "nsAccUtils.h"
+#include "Role.h"
+#include "States.h"
+
+using namespace mozilla::a11y;
+using namespace mozilla::a11y::filters;
+
+uint32_t
+filters::GetSelected(Accessible* aAccessible)
+{
+  if (aAccessible->State() & states::SELECTED)
+    return eMatch | eSkipSubtree;
+
+  return eSkip;
+}
+
+uint32_t
+filters::GetSelectable(Accessible* aAccessible)
+{
+  if (aAccessible->InteractiveState() & states::SELECTABLE)
+    return eMatch | eSkipSubtree;
+
+  return eSkip;
+}
+
+uint32_t
+filters::GetRow(Accessible* aAccessible)
+{
+  a11y::role role = aAccessible->Role();
+  if (role == roles::ROW)
+    return eMatch | eSkipSubtree;
+
+  // Look for rows inside rowgroup.
+  if (role == roles::GROUPING)
+    return eSkip;
+
+  return eSkipSubtree;
+}
+
+uint32_t
+filters::GetCell(Accessible* aAccessible)
+{
+  a11y::role role = aAccessible->Role();
+  return role == roles::GRID_CELL || role == roles::ROWHEADER ||
+    role == roles::COLUMNHEADER ? eMatch : eSkipSubtree;
+}
+
+uint32_t
+filters::GetEmbeddedObject(Accessible* aAccessible)
+{
+  return nsAccUtils::IsEmbeddedObject(aAccessible) ?
+    eMatch | eSkipSubtree : eSkipSubtree;
+}