Get rid of postToElement argument for accessibility notifications.

Source/modules/accessibility/AXTableRow.cpp

Index: Source/modules/accessibility/AXTableRow.cpp
diff --git a/Source/modules/accessibility/AXTableRow.cpp b/Source/modules/accessibility/AXTableRow.cpp
index 88330839f08c95d5a6b7e0b0cc465ccceb3e6964..07df92c24e2383a28a48233235490ffa9cf09317 100644
--- a/Source/modules/accessibility/AXTableRow.cpp
+++ b/Source/modules/accessibility/AXTableRow.cpp
@@ -72,12 +72,6 @@ bool AXTableRow::isTableRow() const
     return true;
 }
 
-AXObject* AXTableRow::observableObject() const
-{
-    // This allows the table to be the one who sends notifications about tables.
-    return parentTable();
-}
-
 bool AXTableRow::computeAccessibilityIsIgnored() const
 {
     AXObjectInclusion decision = defaultObjectInclusion();