Animations: Introduce compositor AnimationPlayer and AnimationTimeline.

Source/web/WebRuntimeFeatures.cpp

Index: Source/web/WebRuntimeFeatures.cpp
diff --git a/Source/web/WebRuntimeFeatures.cpp b/Source/web/WebRuntimeFeatures.cpp
index 6f4a53a69473501af168d321704c8063a2ec3b93..79d6c5b773046e10756ab4db0d5d61ff0154cb82 100644
--- a/Source/web/WebRuntimeFeatures.cpp
+++ b/Source/web/WebRuntimeFeatures.cpp
@@ -58,6 +58,11 @@ void WebRuntimeFeatures::enableBlinkScheduler(bool enable)
     RuntimeEnabledFeatures::setBlinkSchedulerEnabled(enable);
 }
 
+void WebRuntimeFeatures::enableCompositorAnimationTimelines(bool enable)
+{
+    RuntimeEnabledFeatures::setCompositorAnimationTimelinesEnabled(enable);
+}
+
 void WebRuntimeFeatures::enableTestOnlyFeatures(bool enable)
 {
     RuntimeEnabledFeatures::setTestFeaturesEnabled(enable);