Migrate WTF::Vector::append() to ::push_back() [part 2 of N]

third_party/WebKit/Source/core/animation/css/CSSTimingData.cpp

 // Copyright 2014 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/animation/css/CSSTimingData.h"
 
 #include "core/animation/Timing.h"
 
 namespace blink {
 
 CSSTimingData::CSSTimingData() {
-  m_delayList.append(initialDelay());
-  m_durationList.append(initialDuration());
-  m_timingFunctionList.append(initialTimingFunction());
+  m_delayList.push_back(initialDelay());
+  m_durationList.push_back(initialDuration());
+  m_timingFunctionList.push_back(initialTimingFunction());
 }
 
 CSSTimingData::CSSTimingData(const CSSTimingData& other)
     : m_delayList(other.m_delayList),
       m_durationList(other.m_durationList),
       m_timingFunctionList(other.m_timingFunctionList) {}
 
 Timing CSSTimingData::convertToTiming(size_t index) const {
   Timing timing;
   timing.startDelay = getRepeated(m_delayList, index);
   timing.iterationDuration = getRepeated(m_durationList, index);
   timing.timingFunction = getRepeated(m_timingFunctionList, index);
   timing.assertValid();
   return timing;
 }
 
 }  // namespace blink