cc: Clear entries from animations maps only when main thread wins

cc/trees/layer_tree_host_unittest.cc

Index: cc/trees/layer_tree_host_unittest.cc
diff --git a/cc/trees/layer_tree_host_unittest.cc b/cc/trees/layer_tree_host_unittest.cc
index 74e73a25dccf4550cf8aa4d94b0a6b763809103c..50c0e9bbf25fdd74a398150c1fa77b83a68e10e2 100644
--- a/cc/trees/layer_tree_host_unittest.cc
+++ b/cc/trees/layer_tree_host_unittest.cc
@@ -982,6 +982,9 @@ class LayerTreeHostTestEffectTreeSync : public LayerTreeHostTest {
         node->data.is_currently_animating_opacity = true;
         break;
       case 2:
+        node->data.is_currently_animating_opacity = true;
+        break;
+      case 3:
         node->data.is_currently_animating_opacity = false;
         break;
     }
@@ -998,10 +1001,14 @@ class LayerTreeHostTestEffectTreeSync : public LayerTreeHostTest {
         break;
       case 1:
         EXPECT_EQ(node->data.opacity, 0.75f);
-        impl->sync_tree()->root_layer_for_testing()->OnOpacityAnimated(0.75f);
         PostSetNeedsCommitToMainThread();
         break;
       case 2:
+        EXPECT_EQ(node->data.opacity, 0.75f);
+        impl->sync_tree()->root_layer_for_testing()->OnOpacityAnimated(0.75f);
+        PostSetNeedsCommitToMainThread();
+        break;
+      case 3:
         EXPECT_EQ(node->data.opacity, 0.5f);
         EndTest();
         break;
@@ -1063,8 +1070,6 @@ class LayerTreeHostTestTransformTreeSync : public LayerTreeHostTest {
         break;
       case 1:
         EXPECT_EQ(node->data.local, rotate20);
-        impl->sync_tree()->root_layer_for_testing()->OnTransformAnimated(
-            rotate20);
         PostSetNeedsCommitToMainThread();
         break;
       case 2: