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

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

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/dom/FrameRequestCallbackCollection.h"
 
 #include "core/dom/FrameRequestCallback.h"
 #include "core/frame/PerformanceMonitor.h"
 #include "core/inspector/InspectorInstrumentation.h"
 #include "core/inspector/InspectorTraceEvents.h"
 
 namespace blink {
 
 FrameRequestCallbackCollection::FrameRequestCallbackCollection(
     ExecutionContext* context)
     : m_context(context) {}
 
 FrameRequestCallbackCollection::CallbackId
 FrameRequestCallbackCollection::registerCallback(
     FrameRequestCallback* callback) {
   FrameRequestCallbackCollection::CallbackId id = ++m_nextCallbackId;
   callback->m_cancelled = false;
   callback->m_id = id;
-  m_callbacks.append(callback);
+  m_callbacks.push_back(callback);
 
   TRACE_EVENT_INSTANT1("devtools.timeline", "RequestAnimationFrame",
                        TRACE_EVENT_SCOPE_THREAD, "data",
                        InspectorAnimationFrameEvent::data(m_context, id));
   InspectorInstrumentation::asyncTaskScheduled(
       m_context, "requestAnimationFrame", callback);
   InspectorInstrumentation::NativeBreakpoint nativeBreakpoint(
       m_context, "requestAnimationFrame", true);
   return id;
 }
@@ skipping 57 matching lines @@
   m_callbacksToInvoke.clear();
 }
 
 DEFINE_TRACE(FrameRequestCallbackCollection) {
   visitor->trace(m_callbacks);
   visitor->trace(m_callbacksToInvoke);
   visitor->trace(m_context);
 }
 
 }  // namespace blink