Update a result vector when sampling animation effects.

Source/core/animation/css/CSSAnimations.cpp

 /*
  * 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 371 matching lines @@
 
             AnimatableValueKeyframeEffectModel* oldEffect = toAnimatableValueKeyframeEffectModel(inertAnimation->effect());
             const KeyframeVector& frames = oldEffect->getFrames();
 
             AnimatableValueKeyframeVector newFrames;
             newFrames.append(toAnimatableValueKeyframe(frames[0]->clone().get()));
             newFrames.append(toAnimatableValueKeyframe(frames[1]->clone().get()));
 
             newFrames[0]->clearPropertyValue(id);
             RefPtrWillBeRawPtr<InertAnimation> inertAnimationForSampling = InertAnimation::create(oldAnimation->effect(), oldAnimation->specifiedTiming(), false);
-            OwnPtrWillBeRawPtr<WillBeHeapVector<RefPtrWillBeMember<Interpolation>>> sample = inertAnimationForSampling->sample(inheritedTime);
-            ASSERT(sample->size() == 1);
+            OwnPtrWillBeRawPtr<WillBeHeapVector<RefPtrWillBeMember<Interpolation>>> sample = nullptr;
+            inertAnimationForSampling->sample(inheritedTime, sample);
+            ASSERT(sample && sample->size() == 1);
             newFrames[0]->setPropertyValue(id, toLegacyStyleInterpolation(sample->at(0).get())->currentValue());
 
             effect = AnimatableValueKeyframeEffectModel::create(newFrames);
         }
 
         RefPtrWillBeRawPtr<Animation> transition = Animation::create(element, effect, inertAnimation->specifiedTiming(), Animation::TransitionPriority, eventDelegate.release());
         transition->setName(inertAnimation->name());
         RefPtrWillBeRawPtr<AnimationPlayer> player = element->document().timeline().createAnimationPlayer(transition.get());
         player->update(TimingUpdateOnDemand);
         runningTransition.player = player;
@@ skipping 332 matching lines @@
 #if ENABLE(OILPAN)
     visitor->trace(m_newTransitions);
     visitor->trace(m_activeInterpolationsForAnimations);
     visitor->trace(m_activeInterpolationsForTransitions);
     visitor->trace(m_newAnimations);
     visitor->trace(m_cancelledAnimationPlayers);
 #endif
 }
 
 } // namespace blink