Migrate WTF::Vector::append() to ::push_back() [part 4 of N]

third_party/WebKit/Source/core/dom/ScriptedIdleTaskController.cpp

Index: third_party/WebKit/Source/core/dom/ScriptedIdleTaskController.cpp
diff --git a/third_party/WebKit/Source/core/dom/ScriptedIdleTaskController.cpp b/third_party/WebKit/Source/core/dom/ScriptedIdleTaskController.cpp
index 4a5d1eefc8f88043f9a06d3ba4fe30fbaf87548b..9f7b67a4bce132a47b018ba441729a228aa771ae 100644
--- a/third_party/WebKit/Source/core/dom/ScriptedIdleTaskController.cpp
+++ b/third_party/WebKit/Source/core/dom/ScriptedIdleTaskController.cpp
@@ -143,7 +143,7 @@ void ScriptedIdleTaskController::callbackFired(
   if (m_suspended) {
     if (callbackType == IdleDeadline::CallbackType::CalledByTimeout) {
       // Queue for execution when we are resumed.
-      m_pendingTimeouts.append(id);
+      m_pendingTimeouts.push_back(id);
     }
     // Just drop callbacks called while suspended, these will be reposted on the
     // idle task queue when we are resumed.