Migrate WTF::Vector::append() to ::push_back() [part 13 of N]

third_party/WebKit/Source/modules/accessibility/AXTableColumn.cpp

Index: third_party/WebKit/Source/modules/accessibility/AXTableColumn.cpp
diff --git a/third_party/WebKit/Source/modules/accessibility/AXTableColumn.cpp b/third_party/WebKit/Source/modules/accessibility/AXTableColumn.cpp
index b629b13216be985df33ae6c2d4721fef8ddfc284..8b16a25ae6a4f567651a94aec30eea710edf7bfc 100644
--- a/third_party/WebKit/Source/modules/accessibility/AXTableColumn.cpp
+++ b/third_party/WebKit/Source/modules/accessibility/AXTableColumn.cpp
@@ -65,7 +65,7 @@ void AXTableColumn::headerObjectsForColumn(AXObjectVector& headers) {
   if (toAXTable(m_parent)->isAriaTable()) {
     for (const auto& cell : children()) {
       if (cell->roleValue() == ColumnHeaderRole)
-        headers.append(cell);
+        headers.push_back(cell);
     }
     return;
   }
@@ -92,7 +92,7 @@ void AXTableColumn::headerObjectsForColumn(AXObjectVector& headers) {
         continue;
 
       if (toAXTableCell(cell)->scanToDecideHeaderRole() == ColumnHeaderRole)
-        headers.append(cell);
+        headers.push_back(cell);
     }
   }
 }
@@ -140,7 +140,7 @@ void AXTableColumn::addChildren() {
     if (m_children.size() > 0 && m_children.back() == cell)
       continue;
 
-    m_children.append(cell);
+    m_children.push_back(cell);
   }
 }