CC Animations: Establish AnimationHost, AnimationTimeline and AnimationPlayer

cc/BUILD.gn

Index: cc/BUILD.gn
diff --git a/cc/BUILD.gn b/cc/BUILD.gn
index dafa89a13f1dce0ebebff797c4b4747584ec74f9..d1241ee5fb3ce8f8314e64131d18c88e89b795a9 100644
--- a/cc/BUILD.gn
+++ b/cc/BUILD.gn
@@ -15,8 +15,12 @@ component("cc") {
     "animation/animation_events.h",
     "animation/animation_id_provider.cc",
     "animation/animation_id_provider.h",
+    "animation/animation_player.cc",
+    "animation/animation_player.h",
     "animation/animation_registrar.cc",
     "animation/animation_registrar.h",
+    "animation/animation_timeline.cc",
+    "animation/animation_timeline.h",
     "animation/keyframed_animation_curve.cc",
     "animation/keyframed_animation_curve.h",
     "animation/layer_animation_controller.cc",
@@ -513,6 +517,7 @@ component("cc") {
     "trees/layer_tree_host_impl.h",
     "trees/layer_tree_impl.cc",
     "trees/layer_tree_impl.h",
+    "trees/layer_tree_mutators_client.h",
     "trees/layer_tree_settings.cc",
     "trees/layer_tree_settings.h",
     "trees/occlusion.cc",