Plumb timeToNextEffect through players and animation

Source/core/animation/InertAnimation.cpp

Index: Source/core/animation/InertAnimation.cpp
diff --git a/Source/core/animation/InertAnimation.cpp b/Source/core/animation/InertAnimation.cpp
index 8e96e0740727cd537b079bfe41e6d30c6e5eeba9..f40dde51997727294ce269887b69eee22082d9ae 100644
--- a/Source/core/animation/InertAnimation.cpp
+++ b/Source/core/animation/InertAnimation.cpp
@@ -50,4 +50,10 @@ PassOwnPtr<AnimationEffect::CompositableValueMap> InertAnimation::sample()
     return isInEffect() ? m_effect->sample(currentIteration(), timeFraction()) : nullptr;
 }
 
+
+double InertAnimation::calculateTimeToEffectChange(double, double, Phase) const
+{
+    return -1;
+}
+
 } // namespace WebCore