Replaced RefPtr::release with std::move in Source/core.

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

Index: third_party/WebKit/Source/core/animation/css/CSSAnimations.cpp
diff --git a/third_party/WebKit/Source/core/animation/css/CSSAnimations.cpp b/third_party/WebKit/Source/core/animation/css/CSSAnimations.cpp
index c385ff9cbf0fe832febf1d27b99b011eebb95d03..86bd524a931a75e20d217a42386b46c0f2e2e4d4 100644
--- a/third_party/WebKit/Source/core/animation/css/CSSAnimations.cpp
+++ b/third_party/WebKit/Source/core/animation/css/CSSAnimations.cpp
@@ -113,7 +113,7 @@ static StringKeyframeEffectModel* createKeyframeEffectModel(
           DCHECK(value.isCSSWideKeyword());
           timingFunction = CSSTimingData::initialTimingFunction();
         }
-        keyframe->setEasing(timingFunction.release());
+        keyframe->setEasing(std::move(timingFunction));
       } else if (!CSSAnimations::isAnimationAffectingProperty(property)) {
         keyframe->setCSSPropertyValue(property,
                                       properties.propertyAt(j).value());
@@ -715,7 +715,7 @@ void CSSAnimations::calculateTransitionUpdateForProperty(
       AnimatableValueKeyframe::create();
   startKeyframe->setPropertyValue(id, from.get());
   startKeyframe->setOffset(startKeyframeOffset);
-  startKeyframe->setEasing(timing.timingFunction.release());
+  startKeyframe->setEasing(std::move(timing.timingFunction));
   timing.timingFunction = LinearTimingFunction::shared();
   keyframes.push_back(startKeyframe);