Migrate WTF::Deque::append() to ::push_back()

third_party/WebKit/Source/core/input/PointerEventManager.cpp

Index: third_party/WebKit/Source/core/input/PointerEventManager.cpp
diff --git a/third_party/WebKit/Source/core/input/PointerEventManager.cpp b/third_party/WebKit/Source/core/input/PointerEventManager.cpp
index 6e62a1656130e32b0ca32f271097a54da896374f..48f30e17da83593d681ceb12c993948ac37f42d8 100644
--- a/third_party/WebKit/Source/core/input/PointerEventManager.cpp
+++ b/third_party/WebKit/Source/core/input/PointerEventManager.cpp
@@ -406,7 +406,7 @@ void PointerEventManager::dispatchTouchPointerEvents(
       if (result != WebInputEventResult::NotHandled &&
           pointerEvent->type() == EventTypeNames::pointerdown &&
           pointerEvent->isPrimary()) {
-        m_touchIdsForCanceledPointerdowns.append(event.uniqueTouchEventId);
+        m_touchIdsForCanceledPointerdowns.push_back(event.uniqueTouchEventId);
       }
     }
   }