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 64bf8e9ba8a086b58f31026df0a92e79b046ec33..855092edb878cc884b4be8d9bdbe9c53bc4bc17e 100644
--- a/cc/BUILD.gn
+++ b/cc/BUILD.gn
@@ -13,10 +13,18 @@ component("cc") {
     "animation/animation_delegate.h",
     "animation/animation_events.cc",
     "animation/animation_events.h",
+    "animation/animation_host.cc",
+    "animation/animation_host.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/element_animations.cc",
+    "animation/element_animations.h",
     "animation/keyframed_animation_curve.cc",
     "animation/keyframed_animation_curve.h",
     "animation/layer_animation_controller.cc",
@@ -500,6 +508,7 @@ component("cc") {
     "trees/layer_tree_impl.h",
     "trees/layer_tree_settings.cc",
     "trees/layer_tree_settings.h",
+    "trees/mutator_host_client.h",
     "trees/occlusion.cc",
     "trees/occlusion.h",
     "trees/occlusion_tracker.cc",
@@ -559,6 +568,8 @@ source_set("test_support") {
   sources = [
     "test/animation_test_common.cc",
     "test/animation_test_common.h",
+    "test/animation_timelines_test_common.cc",
+    "test/animation_timelines_test_common.h",
     "test/begin_frame_args_test.cc",
     "test/begin_frame_args_test.h",
     "test/failure_output_surface.cc",
@@ -719,7 +730,11 @@ source_set("test_support") {
 
 test("cc_unittests") {
   sources = [
+    "animation/animation_host_unittest.cc",
+    "animation/animation_player_unittest.cc",
+    "animation/animation_timeline_unittest.cc",
     "animation/animation_unittest.cc",
+    "animation/element_animations_unittest.cc",
     "animation/keyframed_animation_curve_unittest.cc",
     "animation/layer_animation_controller_unittest.cc",
     "animation/scroll_offset_animation_curve_unittest.cc",