Bug 1735970 part 13: Support TableAccessibleBase and TableCellAccessibleBase in XPCOM. r=morgan

This doesn't work for non-cached RemoteAccessibles, but this wasn't previously implemented anyway.
With this patch (and all earlier patches in the stack) applied, all the tests in accessible/tests/mochitest pass with the cache enabled, thus testing CachedTableAccessible.

Differential Revision: https://phabricator.services.mozilla.com/D141216

accessible/xpcom/xpcAccessibleTable.cpp

@@ -6,8 +6,8 @@
 
 #include "xpcAccessibleTable.h"
 
-#include "LocalAccessible.h"
-#include "TableAccessible.h"
+#include "mozilla/a11y/Accessible.h"
+#include "mozilla/a11y/TableAccessibleBase.h"
 
 #include "nsIMutableArray.h"
 #include "nsComponentManagerUtils.h"

accessible/xpcom/xpcAccessibleTable.h

@@ -12,6 +12,7 @@
 
 namespace mozilla {
 namespace a11y {
+class TableAccessibleBase;
 
 /**
  * XPCOM wrapper around TableAccessible class.
@@ -65,9 +66,7 @@ class xpcAccessibleTable : public xpcAccessibleHyperText,
   virtual ~xpcAccessibleTable() {}
 
  private:
-  TableAccessible* Intl() {
-    return mIntl->IsLocal() ? mIntl->AsLocal()->AsTable() : nullptr;
-  }
+  TableAccessibleBase* Intl() { return mIntl->AsTableBase(); }
 
   xpcAccessibleTable(const xpcAccessibleTable&) = delete;
   xpcAccessibleTable& operator=(const xpcAccessibleTable&) = delete;

accessible/xpcom/xpcAccessibleTableCell.cpp

@@ -6,10 +6,10 @@
 
 #include "xpcAccessibleTableCell.h"
 
-#include "LocalAccessible.h"
+#include "mozilla/a11y/Accessible.h"
+#include "mozilla/a11y/TableAccessibleBase.h"
+#include "mozilla/a11y/TableCellAccessibleBase.h"
 #include "nsIAccessibleTable.h"
-#include "TableAccessible.h"
-#include "TableCellAccessible.h"
 
 #include "nsComponentManagerUtils.h"
 #include "nsIMutableArray.h"
@@ -34,7 +34,7 @@ xpcAccessibleTableCell::GetTable(nsIAccessibleTable** aTable) {
 
   if (!Intl()) return NS_ERROR_FAILURE;
 
-  TableAccessible* table = Intl()->Table();
+  TableAccessibleBase* table = Intl()->Table();
   if (!table) return NS_ERROR_FAILURE;
 
   nsCOMPtr<nsIAccessibleTable> xpcTable = do_QueryInterface(

accessible/xpcom/xpcAccessibleTableCell.h

@@ -13,6 +13,7 @@
 
 namespace mozilla {
 namespace a11y {
+class TableCellAccessibleBase;
 
 /**
  * XPCOM wrapper around TableAccessibleCell class.
@@ -39,13 +40,7 @@ class xpcAccessibleTableCell : public xpcAccessibleHyperText,
   virtual ~xpcAccessibleTableCell() {}
 
  private:
-  TableCellAccessible* Intl() {
-    if (LocalAccessible* acc = mIntl->AsLocal()) {
-      return acc->AsTableCell();
-    }
-
-    return nullptr;
-  }
+  TableCellAccessibleBase* Intl() { return mIntl->AsTableCellBase(); }
 
   xpcAccessibleTableCell(const xpcAccessibleTableCell&) = delete;
   xpcAccessibleTableCell& operator=(const xpcAccessibleTableCell&) = delete;