CC Animations: Fix AnimationHost mode integration with Property Trees.

cc/test/animation_timelines_test_common.cc

Index: cc/test/animation_timelines_test_common.cc
diff --git a/cc/test/animation_timelines_test_common.cc b/cc/test/animation_timelines_test_common.cc
index 54056080e4efb65d0d01566daf61da462d2c2d8e..cce7d33a10a8282221a7d4f4bca0cb01b283b58a 100644
--- a/cc/test/animation_timelines_test_common.cc
+++ b/cc/test/animation_timelines_test_common.cc
@@ -63,6 +63,8 @@ void TestHostClient::SetMutatorsNeedCommit() {
   mutators_need_commit_ = true;
 }
 
+void TestHostClient::SetMutatorsNeedRebuildPropertyTrees() {}
+
 void TestHostClient::SetLayerFilterMutated(int layer_id,
                                            LayerTreeType tree_type,
                                            const FilterOperations& filters) {
@@ -217,6 +219,11 @@ void AnimationTimelinesTest::SetUp() {
   player_ = AnimationPlayer::Create(player_id_);
 }
 
+void AnimationTimelinesTest::TearDown() {
+  host_impl_->ClearTimelines();
+  host_->ClearTimelines();
+}
+
 void AnimationTimelinesTest::GetImplTimelineAndPlayerByID() {
   timeline_impl_ = host_impl_->GetTimelineById(timeline_id_);
   EXPECT_TRUE(timeline_impl_);