Cleanup: Start using toFoo methods as part of newly adopted coding guideline.

Source/core/accessibility/AccessibilityARIAGridRow.cpp

 /*
  * Copyright (C) 2009 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 55 matching lines @@
     if (!parent || !parent->isAccessibilityTable())
         return;
 
     // Search for rows that match the correct level.
     // Only take the subsequent rows from this one that are +1 from this row's level.
     int index = rowIndex();
     if (index < 0)
         return;
 
     unsigned level = hierarchicalLevel();
-    AccessibilityChildrenVector& allRows = static_cast<AccessibilityTable*>(parent)->rows();
+    AccessibilityChildrenVector& allRows = toAccessibilityTable(parent)->rows();
     int rowCount = allRows.size();
     for (int k = index + 1; k < rowCount; ++k) {
         AccessibilityObject* row = allRows[k].get();
         // Stop at the first row that doesn't match the correct level.
         if (row->hierarchicalLevel() != level + 1)
             break;
 
         disclosedRows.append(row);
     }
 }
 
 AccessibilityObject* AccessibilityARIAGridRow::disclosedByRow() const
 {
     // The row that discloses this one is the row in the table
     // that is aria-level subtract 1 from this row.
     AccessibilityObject* parent = parentObjectUnignored();
     if (!parent || !parent->isAccessibilityTable())
         return 0;
 
     // If the level is 1 or less, than nothing discloses this row.
     unsigned level = hierarchicalLevel();
     if (level <= 1)
         return 0;
 
     // Search for the previous row that matches the correct level.
     int index = rowIndex();
-    AccessibilityChildrenVector& allRows = static_cast<AccessibilityTable*>(parent)->rows();
+    AccessibilityChildrenVector& allRows = toAccessibilityTable(parent)->rows();
     int rowCount = allRows.size();
     if (index >= rowCount)
         return 0;
 
     for (int k = index - 1; k >= 0; --k) {
         AccessibilityObject* row = allRows[k].get();
         if (row->hierarchicalLevel() == level - 1)
             return row;
     }
 
     return 0;
 }
 
 AccessibilityObject* AccessibilityARIAGridRow::headerObject()
 {
     AccessibilityChildrenVector rowChildren = children();
     unsigned childrenCount = rowChildren.size();
     for (unsigned i = 0; i < childrenCount; ++i) {
         AccessibilityObject* cell = rowChildren[i].get();
         if (cell->ariaRoleAttribute() == RowHeaderRole)
             return cell;
     }
 
     return 0;
 }
 
 } // namespace WebCore