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

third_party/WebKit/Source/core/animation/CustomCompositorAnimations.cpp

 // Copyright 2016 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 "CustomCompositorAnimations.h"
 
 #include "core/animation/Animation.h"
 #include "core/animation/DocumentTimeline.h"
 #include "core/animation/KeyframeEffect.h"
 #include "core/animation/KeyframeEffectModel.h"
@@ skipping 78 matching lines @@
                "CustomCompositorAnimations::applyUpdate");
 
   if (mutation.isOpacityMutated()) {
     RefPtr<AnimatableValue> animatableValue =
         AnimatableDouble::create(mutation.opacity());
     m_animation = createOrUpdateAnimation(
         m_animation, element, CSSPropertyOpacity, animatableValue.release());
   }
   if (mutation.isTransformMutated()) {
     TransformOperations ops;
-    ops.operations().append(Matrix3DTransformOperation::create(
+    ops.operations().push_back(Matrix3DTransformOperation::create(
         TransformationMatrix(mutation.transform())));
     RefPtr<AnimatableValue> animatableValue =
         AnimatableTransform::create(ops, 1);
     m_animation = createOrUpdateAnimation(
         m_animation, element, CSSPropertyTransform, animatableValue.release());
   }
 }
 
 }  // namespace blink