diff --git a/accessible/src/atk/Makefile.in b/accessible/src/atk/Makefile.in
index 9fe1f48b857f..2bd347beae8d 100644
--- a/accessible/src/atk/Makefile.in
+++ b/accessible/src/atk/Makefile.in
@@ -99,7 +99,9 @@ endif
 LOCAL_INCLUDES += \
   -I$(srcdir) \
   -I$(srcdir)/../base \
+  -I$(srcdir)/../generic \
   -I$(srcdir)/../html \
+  -I$(srcdir)/../xpcom \
   -I$(srcdir)/../xul \
   -I$(topsrcdir)/other-licenses/atk-1.0 \
   $(NULL)
diff --git a/accessible/src/atk/nsMaiInterfaceTable.cpp b/accessible/src/atk/nsMaiInterfaceTable.cpp
index 1c8971d4fbcc..158e490dd7aa 100644
--- a/accessible/src/atk/nsMaiInterfaceTable.cpp
+++ b/accessible/src/atk/nsMaiInterfaceTable.cpp
@@ -42,12 +42,14 @@
 #include "nsAccessibleWrap.h"
 #include "nsAccUtils.h"
 #include "nsIAccessibleTable.h"
+#include "TableAccessible.h"
 #include "nsMai.h"
 
 #include "nsArrayUtils.h"
 
-extern "C" {
+using namespace mozilla::a11y;
 
+extern "C" {
 static AtkObject*
 refAtCB(AtkTable *aTable, gint aRow, gint aColumn)
 {
@@ -208,23 +210,17 @@ getRowExtentAtCB(AtkTable *aTable,
 }
 
 static AtkObject*
-getCaptionCB(AtkTable *aTable)
+getCaptionCB(AtkTable* aTable)
 {
-    nsAccessibleWrap *accWrap = GetAccessibleWrap(ATK_OBJECT(aTable));
-    if (!accWrap)
-        return nsnull;
+  nsAccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aTable));
+  if (!accWrap)
+    return nsnull;
 
-    nsCOMPtr<nsIAccessibleTable> accTable;
-    accWrap->QueryInterface(NS_GET_IID(nsIAccessibleTable),
-                            getter_AddRefs(accTable));
-    NS_ENSURE_TRUE(accTable, nsnull);
+  TableAccessible* table = accWrap->AsTable();
+  NS_ENSURE_TRUE(table, nsnull);
 
-    nsCOMPtr<nsIAccessible> caption;
-    nsresult rv = accTable->GetCaption(getter_AddRefs(caption));
-    if (NS_FAILED(rv) || !caption)
-        return nsnull;
-
-    return nsAccessibleWrap::GetAtkObject(caption);
+  nsAccessible* caption = table->Caption();
+  return caption ? nsAccessibleWrap::GetAtkObject(caption) : nsnull;
 }
 
 static const gchar*
diff --git a/accessible/src/base/Makefile.in b/accessible/src/base/Makefile.in
index 7fd861756c47..b71efb0c1ba7 100644
--- a/accessible/src/base/Makefile.in
+++ b/accessible/src/base/Makefile.in
@@ -104,8 +104,9 @@ include $(topsrcdir)/config/rules.mk
 
 LOCAL_INCLUDES += \
   -I$(srcdir) \
-  -I$(srcdir)/../xpcom \
+  -I$(srcdir)/../generic \
   -I$(srcdir)/../html \
+  -I$(srcdir)/../xpcom \
   -I$(srcdir)/../xul \
   -I$(srcdir)/../../../layout/generic \
   -I$(srcdir)/../../../layout/style \
diff --git a/accessible/src/base/nsARIAGridAccessible.cpp b/accessible/src/base/nsARIAGridAccessible.cpp
index ed7304d59aa9..4a985b7a0fc0 100644
--- a/accessible/src/base/nsARIAGridAccessible.cpp
+++ b/accessible/src/base/nsARIAGridAccessible.cpp
@@ -58,7 +58,7 @@ using namespace mozilla::a11y;
 
 nsARIAGridAccessible::
   nsARIAGridAccessible(nsIContent* aContent, nsDocAccessible* aDoc) :
-  nsAccessibleWrap(aContent, aDoc)
+  nsAccessibleWrap(aContent, aDoc), xpcAccessibleTable(this)
 {
 }
 
@@ -70,21 +70,18 @@ NS_IMPL_ISUPPORTS_INHERITED1(nsARIAGridAccessible,
                              nsIAccessibleTable)
 
 ////////////////////////////////////////////////////////////////////////////////
-// nsIAccessibleTable
+//nsAccessNode
 
-NS_IMETHODIMP
-nsARIAGridAccessible::GetCaption(nsIAccessible **aCaption)
+void
+nsARIAGridAccessible::Shutdown()
 {
-  NS_ENSURE_ARG_POINTER(aCaption);
-  *aCaption = nsnull;
-
-  if (IsDefunct())
-    return NS_ERROR_FAILURE;
-
-  // XXX: should be pointed by aria-labelledby on grid?
-  return NS_ERROR_NOT_IMPLEMENTED;
+  mTable = nsnull;
+  nsAccessibleWrap::Shutdown();
 }
 
+////////////////////////////////////////////////////////////////////////////////
+// nsIAccessibleTable
+
 NS_IMETHODIMP
 nsARIAGridAccessible::GetSummary(nsAString &aSummary)
 {
@@ -710,15 +707,6 @@ nsARIAGridAccessible::UnselectColumn(PRInt32 aColumn)
   return NS_OK;
 }
 
-NS_IMETHODIMP
-nsARIAGridAccessible::IsProbablyForLayout(bool *aIsProbablyForLayout)
-{
-  NS_ENSURE_ARG_POINTER(aIsProbablyForLayout);
-  *aIsProbablyForLayout = false;
-
-  return NS_OK;
-}
-
 ////////////////////////////////////////////////////////////////////////////////
 // Protected
 
diff --git a/accessible/src/base/nsARIAGridAccessible.h b/accessible/src/base/nsARIAGridAccessible.h
index 9a1806bc701c..c17aaa99b4ec 100644
--- a/accessible/src/base/nsARIAGridAccessible.h
+++ b/accessible/src/base/nsARIAGridAccessible.h
@@ -42,12 +42,16 @@
 #include "nsIAccessibleTable.h"
 
 #include "nsHyperTextAccessibleWrap.h"
+#include "TableAccessible.h"
+#include "xpcAccessibleTable.h"
 
 /**
  * Accessible for ARIA grid and treegrid.
  */
 class nsARIAGridAccessible : public nsAccessibleWrap,
-                             public nsIAccessibleTable
+                             public xpcAccessibleTable,
+                             public nsIAccessibleTable,
+                             public mozilla::a11y::TableAccessible
 {
 public:
   nsARIAGridAccessible(nsIContent* aContent, nsDocAccessible* aDoc);
@@ -56,7 +60,13 @@ public:
   NS_DECL_ISUPPORTS_INHERITED
 
   // nsIAccessibleTable
-  NS_DECL_NSIACCESSIBLETABLE
+  NS_DECL_OR_FORWARD_NSIACCESSIBLETABLE_WITH_XPCACCESSIBLETABLE
+
+  // nsAccessible
+  virtual mozilla::a11y::TableAccessible* AsTable() { return this; }
+
+  // nsAccessNode
+  virtual void Shutdown();
 
 protected:
   /**
diff --git a/accessible/src/base/nsAccessible.h b/accessible/src/base/nsAccessible.h
index e42030167562..daa0696bc33a 100644
--- a/accessible/src/base/nsAccessible.h
+++ b/accessible/src/base/nsAccessible.h
@@ -66,6 +66,11 @@ class nsHTMLImageMapAccessible;
 class nsHTMLLIAccessible;
 struct nsRoleMapEntry;
 class Relation;
+namespace mozilla {
+namespace a11y {
+class TableAccessible;
+}
+}
 class nsTextAccessible;
 
 struct nsRect;
@@ -471,6 +476,8 @@ public:
   inline bool IsRoot() const { return mFlags & eRootAccessible; }
   nsRootAccessible* AsRoot();
 
+  virtual mozilla::a11y::TableAccessible* AsTable() { return nsnull; }
+
   inline bool IsTextLeaf() const { return mFlags & eTextLeafAccessible; }
   nsTextAccessible* AsTextLeaf();
 
diff --git a/accessible/src/generic/TableAccessible.h b/accessible/src/generic/TableAccessible.h
new file mode 100644
index 000000000000..694fb02ed152
--- /dev/null
+++ b/accessible/src/generic/TableAccessible.h
@@ -0,0 +1,170 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* 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/. */
+
+#ifndef TABLE_ACCESSIBLE_H
+#define TABLE_ACCESSIBLE_H
+
+#include "nsString.h"
+#include "nsTArray.h"
+#include "prtypes.h"
+
+class nsAccessible;
+
+namespace mozilla {
+namespace a11y {
+
+/**
+ * Accessible table interface.
+ */
+class TableAccessible
+{
+public:
+
+  /**
+   * Return the caption accessible if any for this table.
+   */
+  virtual nsAccessible* Caption() { return nsnull; }
+
+  /**
+   * Get the summary for this table.
+   */
+  virtual void Summary(nsString& aSummary) { aSummary.Truncate(); }
+
+  /**
+   * Return the number of columns in the table.
+   */
+  virtual PRUint32 ColCount() { return 0; }
+
+  /**
+   * Return the number of rows in the table.
+   */
+  virtual PRUint32 RowCount() { return 0; }
+
+  /**
+   * Return the accessible for the cell at the given row and column indices.
+   */
+  virtual nsAccessible* CellAt(PRUint32 aRowIdx, PRUint32 aColIdx) { return nsnull; }
+
+  /**
+   * Return the index of the cell at the given row and column.
+   */
+  virtual PRInt32 CellIndexAt(PRUint32 aRowIdx, PRUint32 aColIdx) { return -1; }
+
+  /**
+   * Return the column index of the cell with the given index.
+   */
+  virtual PRInt32 ColIndexAt(PRUint32 aCellIdx) { return -1; }
+
+  /**
+   * Return the row index of the cell with the given index.
+   */
+  virtual PRInt32 RowIndexAt(PRUint32 aCellIdx) { return -1; }
+
+  /**
+   * Get the row and column indices for the cell at the given index.
+   */
+  virtual void RowAndColIndicesAt(PRUint32 aCellIdx, PRInt32* aRowIdx,
+                                  PRInt32* aColIdx) {}
+
+  /**
+   * Return the number of columns occupied by the cell at the given row and
+   * column indices.
+   */
+  virtual PRUint32 ColExtentAt(PRUint32 aRowIdx, PRUint32 aColIdx) { return 1; }
+
+  /**
+   * Return the number of rows occupied by the cell at the given row and column
+   * indices.
+   */
+  virtual PRUint32 RowExtentAt(PRUint32 aRowIdx, PRUint32 aColIdx) { return 1; }
+
+  /**
+   * Get the description of the given column.
+   */
+  virtual void ColDescription(PRUint32 aColIdx, nsString& aDescription)
+    { aDescription.Truncate(); }
+
+  /**
+   * Get the description for the given row.
+   */
+  virtual void RowDescription(PRUint32 aRowIdx, nsString& aDescription)
+    { aDescription.Truncate(); }
+
+  /**
+   * Return true if the given column is selected.
+   */
+  virtual bool IsColSelected(PRUint32 aColIdx) { return false; }
+
+  /**
+   * Return true if the given row is selected.
+   */
+  virtual bool IsRowSelected(PRUint32 aRowIdx) { return false; }
+
+  /**
+   * Return true if the given cell is selected.
+   */
+  virtual bool IsCellSelected(PRUint32 aRowIdx, PRUint32 aColIdx) { return false; }
+
+  /**
+   * Return the number of selected cells.
+   */
+  virtual PRUint32 SelectedCellCount() { return 0; }
+
+  /**
+   * Return the number of selected columns.
+   */
+  virtual PRUint32 SelectedColCount() { return 0; }
+
+  /**
+   * Return the number of selected rows.
+   */
+  virtual PRUint32 SelectedRowCount() { return 0; }
+
+  /**
+   * Get the set of selected cells.
+   */
+  virtual void SelectedCells(nsTArray<nsAccessible*>* aCells) {}
+
+  /**
+   * Get the set of selected column indices.
+   */
+  virtual void SelectedColIndices(nsTArray<PRUint32>* aCols) {}
+
+  /**
+   * Get the set of selected row indices.
+   */
+  virtual void SelectedRowIndices(nsTArray<PRUint32>* aRows) {}
+
+  /**
+   * Select the given column unselecting any other selected columns.
+   */
+  virtual void SelectCol(PRUint32 aColIdx) {}
+
+  /**
+   * Select the given row unselecting all other previously selected rows.
+   */
+  virtual void SelectRow(PRUint32 aRowIdx) {}
+
+  /**
+   * Unselect the given column leaving other selected columns selected.
+   */
+  virtual void UnselectCol(PRUint32 aColIdx) {}
+
+  /**
+   * Unselect the given row leaving other selected rows selected.
+   */
+  virtual void UnselectRow(PRUint32 aRowIdx) {}
+
+  /**
+   * Return true if the table is probably for layout.
+   */
+  virtual bool IsProbablyLayoutTable() { return false; }
+};
+
+} // namespace a11y
+} // namespace mozilla
+
+#endif
diff --git a/accessible/src/html/Makefile.in b/accessible/src/html/Makefile.in
index 7820e4a8b1db..ebd863076962 100644
--- a/accessible/src/html/Makefile.in
+++ b/accessible/src/html/Makefile.in
@@ -73,6 +73,8 @@ include $(topsrcdir)/config/rules.mk
 
 LOCAL_INCLUDES = \
   -I$(srcdir)/../base \
+  -I$(srcdir)/../generic \
+  -I$(srcdir)/../xpcom \
   -I$(srcdir)/../../../layout/generic \
   -I$(srcdir)/../../../layout/xul/base/src \
   $(NULL)
diff --git a/accessible/src/html/nsHTMLTableAccessible.cpp b/accessible/src/html/nsHTMLTableAccessible.cpp
index a5547bb3d1cc..a09c2740b68c 100644
--- a/accessible/src/html/nsHTMLTableAccessible.cpp
+++ b/accessible/src/html/nsHTMLTableAccessible.cpp
@@ -436,7 +436,7 @@ nsHTMLTableHeaderCellAccessible::NativeRole()
 
 nsHTMLTableAccessible::
   nsHTMLTableAccessible(nsIContent* aContent, nsDocAccessible* aDoc) :
-  nsAccessibleWrap(aContent, aDoc)
+  nsAccessibleWrap(aContent, aDoc), xpcAccessibleTable(this)
 {
 }
 
@@ -446,6 +446,16 @@ nsHTMLTableAccessible::
 NS_IMPL_ISUPPORTS_INHERITED2(nsHTMLTableAccessible, nsAccessible,
                              nsHTMLTableAccessible, nsIAccessibleTable)
 
+////////////////////////////////////////////////////////////////////////////////
+//nsAccessNode
+
+void
+nsHTMLTableAccessible::Shutdown()
+{
+  mTable = nsnull;
+  nsAccessibleWrap::Shutdown();
+}
+
 
 ////////////////////////////////////////////////////////////////////////////////
 // nsHTMLTableAccessible: nsAccessible implementation
@@ -511,9 +521,7 @@ nsHTMLTableAccessible::GetAttributesInternal(nsIPersistentProperties *aAttribute
   nsresult rv = nsAccessibleWrap::GetAttributesInternal(aAttributes);
   NS_ENSURE_SUCCESS(rv, rv);
 
-  bool isProbablyForLayout;
-  IsProbablyForLayout(&isProbablyForLayout);
-  if (isProbablyForLayout) {
+  if (IsProbablyLayoutTable()) {
     nsAutoString oldValueUnused;
     aAttributes->SetStringProperty(NS_LITERAL_CSTRING("layout-guess"),
                                    NS_LITERAL_STRING("true"), oldValueUnused);
@@ -538,13 +546,11 @@ nsHTMLTableAccessible::RelationByType(PRUint32 aType)
 ////////////////////////////////////////////////////////////////////////////////
 // nsHTMLTableAccessible: nsIAccessibleTable implementation
 
-NS_IMETHODIMP
-nsHTMLTableAccessible::GetCaption(nsIAccessible **aCaption)
+nsAccessible*
+nsHTMLTableAccessible::Caption()
 {
-  NS_ENSURE_ARG_POINTER(aCaption);
-
-  NS_IF_ADDREF(*aCaption = Caption());
-  return NS_OK;
+  nsAccessible* child = mChildren.SafeElementAt(0, nsnull);
+  return child && child->Role() == roles::CAPTION ? child : nsnull;
 }
 
 NS_IMETHODIMP
@@ -1307,8 +1313,7 @@ nsHTMLTableAccessible::Description(nsString& aDescription)
 
 #ifdef SHOW_LAYOUT_HEURISTIC
   if (aDescription.IsEmpty()) {
-    bool isProbablyForLayout;
-    IsProbablyForLayout(&isProbablyForLayout);
+    bool isProbablyForLayout = IsProbablyLayoutTable();
     aDescription = mLayoutHeuristic;
   }
 #ifdef DEBUG_A11Y
@@ -1357,8 +1362,8 @@ nsHTMLTableAccessible::HasDescendant(const nsAString& aTagName,
   return !!foundItem;
 }
 
-NS_IMETHODIMP
-nsHTMLTableAccessible::IsProbablyForLayout(bool *aIsProbablyForLayout)
+bool
+nsHTMLTableAccessible::IsProbablyLayoutTable()
 {
   // Implement a heuristic to determine if table is most likely used for layout
   // XXX do we want to look for rowspan or colspan, especialy that span all but a couple cells
@@ -1370,18 +1375,16 @@ nsHTMLTableAccessible::IsProbablyForLayout(bool *aIsProbablyForLayout)
   // Change to |#define SHOW_LAYOUT_HEURISTIC DEBUG| before final release
 #ifdef SHOW_LAYOUT_HEURISTIC
 #define RETURN_LAYOUT_ANSWER(isLayout, heuristic) \
-  { *aIsProbablyForLayout = isLayout; \
-    mLayoutHeuristic = isLayout ? NS_LITERAL_STRING("layout table: ") : NS_LITERAL_STRING("data table: "); \
-    mLayoutHeuristic += NS_LITERAL_STRING(heuristic); return NS_OK; }
+  { \
+    mLayoutHeuristic = isLayout ? \
+      NS_LITERAL_STRING("layout table: " heuristic) : \
+      NS_LITERAL_STRING("data table: " heuristic); \
+    return isLayout; \
+  }
 #else
-#define RETURN_LAYOUT_ANSWER(isLayout, heuristic) { *aIsProbablyForLayout = isLayout; return NS_OK; }
+#define RETURN_LAYOUT_ANSWER(isLayout, heuristic) { return isLayout; }
 #endif
 
-  *aIsProbablyForLayout = false;
-
-  if (IsDefunct())
-    return NS_ERROR_FAILURE;
-
   nsDocAccessible* docAccessible = Document();
   if (docAccessible) {
     PRUint64 docState = docAccessible->State();
diff --git a/accessible/src/html/nsHTMLTableAccessible.h b/accessible/src/html/nsHTMLTableAccessible.h
index bf10061ba038..4691bd9fc6d7 100644
--- a/accessible/src/html/nsHTMLTableAccessible.h
+++ b/accessible/src/html/nsHTMLTableAccessible.h
@@ -41,6 +41,8 @@
 
 #include "nsHyperTextAccessibleWrap.h"
 #include "nsIAccessibleTable.h"
+#include "TableAccessible.h"
+#include "xpcAccessibleTable.h"
 
 class nsITableLayout;
 class nsITableCellLayout;
@@ -121,16 +123,28 @@ public:
 }
 
 class nsHTMLTableAccessible : public nsAccessibleWrap,
-                              public nsIAccessibleTable
+                              public xpcAccessibleTable,
+                              public nsIAccessibleTable,
+                              public mozilla::a11y::TableAccessible
 {
 public:
   nsHTMLTableAccessible(nsIContent* aContent, nsDocAccessible* aDoc);
 
   NS_DECL_ISUPPORTS_INHERITED
-  NS_DECL_NSIACCESSIBLETABLE
   NS_DECLARE_STATIC_IID_ACCESSOR(NS_TABLEACCESSIBLE_IMPL_CID)
 
+  // nsIAccessible Table
+  NS_DECL_OR_FORWARD_NSIACCESSIBLETABLE_WITH_XPCACCESSIBLETABLE
+
+  // TableAccessible
+  virtual nsAccessible* Caption();
+  virtual bool IsProbablyLayoutTable();
+
+  // nsAccessNode
+  virtual void Shutdown();
+
   // nsAccessible
+  virtual mozilla::a11y::TableAccessible* AsTable() { return this; }
   virtual void Description(nsString& aDescription);
   virtual nsresult GetNameInternal(nsAString& aName);
   virtual mozilla::a11y::role NativeRole();
@@ -138,13 +152,6 @@ public:
   virtual nsresult GetAttributesInternal(nsIPersistentProperties *aAttributes);
   virtual Relation RelationByType(PRUint32 aRelationType);
 
-  // TableAccessible
-  inline nsAccessible* Caption() const
-  {
-    nsAccessible* child = mChildren.SafeElementAt(0, nsnull);
-    return child && child->Role() == mozilla::a11y::roles::CAPTION ? child : nsnull;
-  }
-
   // nsHTMLTableAccessible
 
   /**
diff --git a/accessible/src/xpcom/Makefile.in b/accessible/src/xpcom/Makefile.in
index d270bd35ab31..31ffd6b24f1d 100644
--- a/accessible/src/xpcom/Makefile.in
+++ b/accessible/src/xpcom/Makefile.in
@@ -50,6 +50,7 @@ LIBXUL_LIBRARY = 1
 CPPSRCS = \
   nsAccEvent.cpp \
   nsAccessibleRelation.cpp \
+  xpcAccessibleTable.cpp \
   $(NULL)
 
 # we don't want the shared lib, but we want to force the creation of a static lib.
@@ -59,4 +60,5 @@ include $(topsrcdir)/config/rules.mk
 
 LOCAL_INCLUDES = \
   -I$(srcdir)/../base \
+  -I$(srcdir)/../generic \
   $(NULL)
diff --git a/accessible/src/xpcom/xpcAccessibleTable.cpp b/accessible/src/xpcom/xpcAccessibleTable.cpp
new file mode 100644
index 000000000000..9923490ecbef
--- /dev/null
+++ b/accessible/src/xpcom/xpcAccessibleTable.cpp
@@ -0,0 +1,34 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* 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 "xpcAccessibleTable.h"
+
+#include "nsAccessible.h"
+#include "TableAccessible.h"
+
+nsresult
+xpcAccessibleTable::GetCaption(nsIAccessible** aCaption)
+{
+  NS_ENSURE_ARG_POINTER(aCaption);
+  *aCaption = nsnull;
+  if (!mTable)
+    return NS_ERROR_FAILURE;
+
+  NS_IF_ADDREF(*aCaption = mTable->Caption());
+  return NS_OK;
+}
+
+nsresult
+xpcAccessibleTable::IsProbablyForLayout(bool* aResult)
+{
+  NS_ENSURE_ARG_POINTER(aResult);
+  *aResult = false;
+  if (!mTable)
+    return NS_ERROR_FAILURE;
+
+  *aResult = mTable->IsProbablyLayoutTable();
+  return NS_OK;
+}
diff --git a/accessible/src/xpcom/xpcAccessibleTable.h b/accessible/src/xpcom/xpcAccessibleTable.h
new file mode 100644
index 000000000000..afec19601771
--- /dev/null
+++ b/accessible/src/xpcom/xpcAccessibleTable.h
@@ -0,0 +1,63 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* 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/. */
+
+#ifndef MOZILLA_A11Y_XPCOM_XPACCESSIBLETABLE_H_
+#define MOZILLA_A11Y_XPCOM_XPACCESSIBLETABLE_H_
+
+#include "nscore.h"
+
+class nsIAccessible;
+namespace mozilla {
+namespace a11y {
+class TableAccessible;
+}
+}
+
+class xpcAccessibleTable
+{
+public:
+  xpcAccessibleTable(mozilla::a11y::TableAccessible* aTable) : mTable(aTable) { }
+
+  nsresult GetCaption(nsIAccessible** aCaption);
+  nsresult IsProbablyForLayout(bool* aIsForLayout);
+
+protected:
+  mozilla::a11y::TableAccessible* mTable;
+};
+
+#define NS_DECL_OR_FORWARD_NSIACCESSIBLETABLE_WITH_XPCACCESSIBLETABLE \
+  NS_IMETHOD GetCaption(nsIAccessible** aCaption) \
+    { return xpcAccessibleTable::GetCaption(aCaption); } \
+  NS_SCRIPTABLE NS_IMETHOD GetSummary(nsAString & aSummary); \
+  NS_SCRIPTABLE NS_IMETHOD GetColumnCount(PRInt32 *aColumnCount); \
+  NS_SCRIPTABLE NS_IMETHOD GetRowCount(PRInt32 *aRowCount); \
+  NS_SCRIPTABLE NS_IMETHOD GetCellAt(PRInt32 rowIndex, PRInt32 columnIndex, nsIAccessible * *_retval NS_OUTPARAM); \
+  NS_SCRIPTABLE NS_IMETHOD GetCellIndexAt(PRInt32 rowIndex, PRInt32 columnIndex, PRInt32 *_retval NS_OUTPARAM); \
+  NS_SCRIPTABLE NS_IMETHOD GetColumnIndexAt(PRInt32 cellIndex, PRInt32 *_retval NS_OUTPARAM); \
+  NS_SCRIPTABLE NS_IMETHOD GetRowIndexAt(PRInt32 cellIndex, PRInt32 *_retval NS_OUTPARAM); \
+  NS_SCRIPTABLE NS_IMETHOD GetRowAndColumnIndicesAt(PRInt32 cellIndex, PRInt32 *rowIndex NS_OUTPARAM, PRInt32 *columnIndex NS_OUTPARAM); \
+  NS_SCRIPTABLE NS_IMETHOD GetColumnExtentAt(PRInt32 row, PRInt32 column, PRInt32 *_retval NS_OUTPARAM); \
+  NS_SCRIPTABLE NS_IMETHOD GetRowExtentAt(PRInt32 row, PRInt32 column, PRInt32 *_retval NS_OUTPARAM); \
+  NS_SCRIPTABLE NS_IMETHOD GetColumnDescription(PRInt32 columnIndex, nsAString & _retval NS_OUTPARAM); \
+  NS_SCRIPTABLE NS_IMETHOD GetRowDescription(PRInt32 rowIndex, nsAString & _retval NS_OUTPARAM); \
+  NS_SCRIPTABLE NS_IMETHOD IsColumnSelected(PRInt32 columnIndex, bool *_retval NS_OUTPARAM); \
+  NS_SCRIPTABLE NS_IMETHOD IsRowSelected(PRInt32 rowIndex, bool *_retval NS_OUTPARAM); \
+  NS_SCRIPTABLE NS_IMETHOD IsCellSelected(PRInt32 rowIndex, PRInt32 columnIndex, bool *_retval NS_OUTPARAM); \
+  NS_SCRIPTABLE NS_IMETHOD GetSelectedCellCount(PRUint32 *aSelectedCellCount); \
+  NS_SCRIPTABLE NS_IMETHOD GetSelectedColumnCount(PRUint32 *aSelectedColumnCount); \
+  NS_SCRIPTABLE NS_IMETHOD GetSelectedRowCount(PRUint32 *aSelectedRowCount); \
+  NS_SCRIPTABLE NS_IMETHOD GetSelectedCells(nsIArray * *aSelectedCells); \
+  NS_SCRIPTABLE NS_IMETHOD GetSelectedCellIndices(PRUint32 *cellsArraySize NS_OUTPARAM, PRInt32 **cellsArray NS_OUTPARAM); \
+  NS_SCRIPTABLE NS_IMETHOD GetSelectedColumnIndices(PRUint32 *rowsArraySize NS_OUTPARAM, PRInt32 **rowsArray NS_OUTPARAM); \
+  NS_SCRIPTABLE NS_IMETHOD GetSelectedRowIndices(PRUint32 *rowsArraySize NS_OUTPARAM, PRInt32 **rowsArray NS_OUTPARAM); \
+  NS_SCRIPTABLE NS_IMETHOD SelectRow(PRInt32 rowIndex); \
+  NS_SCRIPTABLE NS_IMETHOD SelectColumn(PRInt32 columnIndex); \
+  NS_SCRIPTABLE NS_IMETHOD UnselectColumn(PRInt32 columnIndex); \
+  NS_IMETHOD UnselectRow(PRInt32 aRowIdx); \
+  NS_IMETHOD IsProbablyForLayout(bool* aResult) \
+  { return xpcAccessibleTable::IsProbablyForLayout(aResult); } \
+
+#endif // MOZILLA_A11Y_XPCOM_XPACCESSIBLETABLE_H_
diff --git a/accessible/src/xul/Makefile.in b/accessible/src/xul/Makefile.in
index 05a4bc7492e4..e86dcd64420e 100644
--- a/accessible/src/xul/Makefile.in
+++ b/accessible/src/xul/Makefile.in
@@ -72,7 +72,9 @@ include $(topsrcdir)/config/rules.mk
 LOCAL_INCLUDES = \
   -I$(srcdir) \
   -I$(srcdir)/../base \
+  -I$(srcdir)/../generic \
   -I$(srcdir)/../html \
+  -I$(srcdir)/../xpcom \
   -I$(srcdir)/../../../layout/generic \
   -I$(srcdir)/../../../layout/xul/base/src \
   $(NULL)
diff --git a/accessible/src/xul/nsXULListboxAccessible.cpp b/accessible/src/xul/nsXULListboxAccessible.cpp
index 4adcc94d0e7c..971620d3598b 100644
--- a/accessible/src/xul/nsXULListboxAccessible.cpp
+++ b/accessible/src/xul/nsXULListboxAccessible.cpp
@@ -134,7 +134,7 @@ nsXULColumnItemAccessible::DoAction(PRUint8 aIndex)
 
 nsXULListboxAccessible::
   nsXULListboxAccessible(nsIContent* aContent, nsDocAccessible* aDoc) :
-  XULSelectControlAccessible(aContent, aDoc)
+  XULSelectControlAccessible(aContent, aDoc), xpcAccessibleTable(this)
 {
   nsIContent* parentContent = mContent->GetParent();
   if (parentContent) {
@@ -164,6 +164,16 @@ nsXULListboxAccessible::QueryInterface(REFNSIID aIID, void** aInstancePtr)
   return NS_ERROR_NO_INTERFACE;
 }
 
+////////////////////////////////////////////////////////////////////////////////
+//nsAccessNode
+
+void
+nsXULListboxAccessible::Shutdown()
+{
+  mTable = nsnull;
+  XULSelectControlAccessible::Shutdown();
+}
+
 bool
 nsXULListboxAccessible::IsMulticolumn()
 {
@@ -229,15 +239,6 @@ nsXULListboxAccessible::NativeRole()
 ////////////////////////////////////////////////////////////////////////////////
 // nsXULListboxAccessible. nsIAccessibleTable
 
-NS_IMETHODIMP
-nsXULListboxAccessible::GetCaption(nsIAccessible **aCaption)
-{
-  NS_ENSURE_ARG_POINTER(aCaption);
-  *aCaption = nsnull;
-
-  return NS_OK;
-}
-
 NS_IMETHODIMP
 nsXULListboxAccessible::GetSummary(nsAString &aSummary)
 {
@@ -820,15 +821,6 @@ nsXULListboxAccessible::UnselectColumn(PRInt32 aColumn)
   return NS_OK;
 }
 
-NS_IMETHODIMP
-nsXULListboxAccessible::IsProbablyForLayout(bool *aIsProbablyForLayout)
-{
-  NS_ENSURE_ARG_POINTER(aIsProbablyForLayout);
-  *aIsProbablyForLayout = false;
-
-  return NS_OK;
-}
-
 ////////////////////////////////////////////////////////////////////////////////
 // nsXULListboxAccessible: Widgets
 
diff --git a/accessible/src/xul/nsXULListboxAccessible.h b/accessible/src/xul/nsXULListboxAccessible.h
index be49fadc6c3d..06fdd3470c07 100644
--- a/accessible/src/xul/nsXULListboxAccessible.h
+++ b/accessible/src/xul/nsXULListboxAccessible.h
@@ -40,11 +40,12 @@
 #ifndef __nsXULListboxAccessible_h__
 #define __nsXULListboxAccessible_h__
 
-#include "nsIAccessibleTable.h"
-
 #include "nsCOMPtr.h"
 #include "nsXULMenuAccessible.h"
 #include "nsBaseWidgetAccessible.h"
+#include "nsIAccessibleTable.h"
+#include "TableAccessible.h"
+#include "xpcAccessibleTable.h"
 #include "XULSelectControlAccessible.h"
 
 class nsIWeakReference;
@@ -90,19 +91,27 @@ public:
  * A class the represents the XUL Listbox widget.
  */
 class nsXULListboxAccessible : public XULSelectControlAccessible,
-                               public nsIAccessibleTable
+                               public xpcAccessibleTable,
+                               public nsIAccessibleTable,
+                               public mozilla::a11y::TableAccessible
 {
 public:
   nsXULListboxAccessible(nsIContent* aContent, nsDocAccessible* aDoc);
   virtual ~nsXULListboxAccessible() {}
 
   NS_DECL_ISUPPORTS_INHERITED
-  NS_DECL_NSIACCESSIBLETABLE
+
+  // nsIAccessibleTable
+  NS_DECL_OR_FORWARD_NSIACCESSIBLETABLE_WITH_XPCACCESSIBLETABLE
 
   // nsIAccessible
   NS_IMETHOD GetValue(nsAString& aValue);
 
+  // nsAccessNode
+  virtual void Shutdown();
+
   // nsAccessible
+  virtual mozilla::a11y::TableAccessible* AsTable() { return this; }
   virtual mozilla::a11y::role NativeRole();
   virtual PRUint64 NativeState();
 
diff --git a/accessible/src/xul/nsXULTreeGridAccessible.cpp b/accessible/src/xul/nsXULTreeGridAccessible.cpp
index c3ca02691035..acd46c643ff5 100644
--- a/accessible/src/xul/nsXULTreeGridAccessible.cpp
+++ b/accessible/src/xul/nsXULTreeGridAccessible.cpp
@@ -58,7 +58,7 @@ using namespace mozilla::a11y;
 
 nsXULTreeGridAccessible::
   nsXULTreeGridAccessible(nsIContent* aContent, nsDocAccessible* aDoc) :
-  nsXULTreeAccessible(aContent, aDoc)
+  nsXULTreeAccessible(aContent, aDoc), xpcAccessibleTable(this)
 {
 }
 
@@ -72,15 +72,6 @@ NS_IMPL_ISUPPORTS_INHERITED1(nsXULTreeGridAccessible,
 ////////////////////////////////////////////////////////////////////////////////
 // nsXULTreeGridAccessible: nsIAccessibleTable implementation
 
-NS_IMETHODIMP
-nsXULTreeGridAccessible::GetCaption(nsIAccessible **aCaption)
-{
-  NS_ENSURE_ARG_POINTER(aCaption);
-  *aCaption = nsnull;
-
-  return IsDefunct() ? NS_ERROR_FAILURE : NS_OK;
-}
-
 NS_IMETHODIMP
 nsXULTreeGridAccessible::GetSummary(nsAString &aSummary)
 {
@@ -570,13 +561,14 @@ nsXULTreeGridAccessible::UnselectColumn(PRInt32 aColumnIndex)
   return NS_OK;
 }
 
-NS_IMETHODIMP
-nsXULTreeGridAccessible::IsProbablyForLayout(bool *aIsProbablyForLayout)
-{
-  NS_ENSURE_ARG_POINTER(aIsProbablyForLayout);
-  *aIsProbablyForLayout = false;
+////////////////////////////////////////////////////////////////////////////////
+// nsXULTreeGridAccessible: nsAccessNode implementation
 
-  return NS_OK;
+void
+nsXULTreeGridAccessible::Shutdown()
+{
+  mTable = nsnull;
+  nsXULTreeAccessible::Shutdown();
 }
 
 ////////////////////////////////////////////////////////////////////////////////
diff --git a/accessible/src/xul/nsXULTreeGridAccessible.h b/accessible/src/xul/nsXULTreeGridAccessible.h
index 0f3771373f83..bed9d95a1573 100644
--- a/accessible/src/xul/nsXULTreeGridAccessible.h
+++ b/accessible/src/xul/nsXULTreeGridAccessible.h
@@ -39,15 +39,17 @@
 #ifndef __nsXULTreeGridAccessible_h__
 #define __nsXULTreeGridAccessible_h__
 
-#include "nsIAccessibleTable.h"
-
 #include "nsXULTreeAccessible.h"
+#include "TableAccessible.h"
+#include "xpcAccessibleTable.h"
 
 /**
  * Represents accessible for XUL tree in the case when it has multiple columns.
  */
 class nsXULTreeGridAccessible : public nsXULTreeAccessible,
-                                public nsIAccessibleTable
+                                public xpcAccessibleTable,
+                                public nsIAccessibleTable,
+                                public mozilla::a11y::TableAccessible
 {
 public:
   nsXULTreeGridAccessible(nsIContent* aContent, nsDocAccessible* aDoc);
@@ -56,9 +58,13 @@ public:
   NS_DECL_ISUPPORTS_INHERITED
 
   // nsIAccessibleTable
-  NS_DECL_NSIACCESSIBLETABLE
+  NS_DECL_OR_FORWARD_NSIACCESSIBLETABLE_WITH_XPCACCESSIBLETABLE
+
+  // nsAccessNode
+  virtual void Shutdown();
 
   // nsAccessible
+  virtual mozilla::a11y::TableAccessible* AsTable() { return this; }
   virtual mozilla::a11y::role NativeRole();
 
 protected: