Use c++11 range loops in accessibility

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 a958688603cee563058d6d5506ba3f1f5df1edbd..88330839f08c95d5a6b7e0b0cc465ccceb3e6964 100644
--- a/Source/modules/accessibility/AXTableRow.cpp
+++ b/Source/modules/accessibility/AXTableRow.cpp
@@ -116,14 +116,11 @@ void AXTableRow::headerObjectsForRow(AccessibilityChildrenVector& headers)
     if (!m_layoutObject || !m_layoutObject->isTableRow())
         return;
 
-    const AccessibilityChildrenVector& rowChildren = children();
-    unsigned childrenCount = rowChildren.size();
-    for (unsigned i = 0; i < childrenCount; i++) {
-        AXObject* cell = rowChildren[i].get();
+    for (const auto& cell : children()) {
         if (!cell->isTableCell())
             continue;
 
-        if (toAXTableCell(cell)->scanToDecideHeaderRole() == RowHeaderRole)
+        if (toAXTableCell(cell.get())->scanToDecideHeaderRole() == RowHeaderRole)
             headers.append(cell);
     }
 }