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

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

Index: third_party/WebKit/Source/core/animation/CompositorPendingAnimations.cpp
diff --git a/third_party/WebKit/Source/core/animation/CompositorPendingAnimations.cpp b/third_party/WebKit/Source/core/animation/CompositorPendingAnimations.cpp
index a0ee3e8f55ddf1265c59ae7271df9781f3e53426..68d365ff4d960836c6585c89f08fdf950eee97a1 100644
--- a/third_party/WebKit/Source/core/animation/CompositorPendingAnimations.cpp
+++ b/third_party/WebKit/Source/core/animation/CompositorPendingAnimations.cpp
@@ -42,7 +42,7 @@ namespace blink {
 void CompositorPendingAnimations::add(Animation* animation) {
   DCHECK(animation);
   DCHECK_EQ(m_pending.find(animation), kNotFound);
-  m_pending.append(animation);
+  m_pending.push_back(animation);
 
   Document* document = animation->timeline()->document();
   if (document->view())
@@ -82,10 +82,10 @@ bool CompositorPendingAnimations::update(bool startOnCompositor) {
 
       if (animation->playing() && !animation->hasStartTime() &&
           animation->timeline() && animation->timeline()->isActive()) {
-        waitingForStartTime.append(animation.get());
+        waitingForStartTime.push_back(animation.get());
       }
     } else {
-      deferred.append(animation);
+      deferred.push_back(animation);
     }
   }
 
@@ -95,7 +95,7 @@ bool CompositorPendingAnimations::update(bool startOnCompositor) {
   if (startedSynchronizedOnCompositor) {
     for (auto& animation : waitingForStartTime) {
       if (!animation->hasStartTime()) {
-        m_waitingForCompositorAnimationStart.append(animation);
+        m_waitingForCompositorAnimationStart.push_back(animation);
       }
     }
   } else {
@@ -153,7 +153,7 @@ void CompositorPendingAnimations::notifyCompositorAnimationStarted(
     }
     if (compositorGroup && animation->compositorGroup() != compositorGroup) {
       // Still waiting.
-      m_waitingForCompositorAnimationStart.append(animation);
+      m_waitingForCompositorAnimationStart.push_back(animation);
       continue;
     }
     animation->notifyCompositorStartTime(monotonicAnimationStartTime -