Replace tests of ASSERT_ENABLED with ENABLE(ASSERT).

Source/core/animation/css/CSSAnimations.cpp

Index: Source/core/animation/css/CSSAnimations.cpp
diff --git a/Source/core/animation/css/CSSAnimations.cpp b/Source/core/animation/css/CSSAnimations.cpp
index 05e358ec61969f59c4af125a4e8dfe9f9c886dc3..f4fe40ba2a440fd3993f02208c603e2cb2d8626d 100644
--- a/Source/core/animation/css/CSSAnimations.cpp
+++ b/Source/core/animation/css/CSSAnimations.cpp
@@ -236,7 +236,7 @@ void CSSAnimations::calculateAnimationUpdate(CSSAnimationUpdate* update, Element
 {
     const ActiveAnimations* activeAnimations = element ? element->activeAnimations() : 0;
 
-#if !ASSERT_ENABLED
+#if !ENABLE(ASSERT)
     // If we're in an animation style change, no animations can have started, been cancelled or changed play state.
     // When ASSERT is enabled, we verify this optimization.
     if (activeAnimations && activeAnimations->isAnimationStyleChange())
@@ -460,7 +460,7 @@ void CSSAnimations::calculateTransitionUpdate(CSSAnimationUpdate* update, const
     const TransitionMap* activeTransitions = activeAnimations ? &activeAnimations->cssAnimations().m_transitions : 0;
     const CSSTransitionData* transitionData = style.transitions();
 
-#if ASSERT_ENABLED
+#if ENABLE(ASSERT)
     // In debug builds we verify that it would have been safe to avoid populating and testing listedProperties if the style recalc is due to animation.
     const bool animationStyleRecalc = false;
 #else