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

third_party/WebKit/Source/core/animation/ElementAnimation.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 92 matching lines @@
 
     if (!element.hasAnimations())
       return animations;
 
     for (const auto& animation :
          element.document().timeline().getAnimations()) {
       DCHECK(animation->effect());
       if (toKeyframeEffectReadOnly(animation->effect())->target() == element &&
           (animation->effect()->isCurrent() ||
            animation->effect()->isInEffect()))
-        animations.append(animation);
+        animations.push_back(animation);
     }
     return animations;
   }
 
  private:
   static Animation* animateInternal(Element& element,
                                     EffectModel* effect,
                                     const Timing& timing) {
     KeyframeEffect* keyframeEffect =
         KeyframeEffect::create(&element, effect, timing);
     return element.document().timeline().play(keyframeEffect);
   }
 };
 
 }  // namespace blink
 
 #endif  // ElementAnimation_h