cc : Track opacity animation changes on effect tree

cc/trees/layer_tree_host_common_unittest.cc

Index: cc/trees/layer_tree_host_common_unittest.cc
diff --git a/cc/trees/layer_tree_host_common_unittest.cc b/cc/trees/layer_tree_host_common_unittest.cc
index ea9defbe83d668f9d89205ce829be8b9be757c10..1e83d6981a83ea15f538e3f3e8eb519ec8acc4c8 100644
--- a/cc/trees/layer_tree_host_common_unittest.cc
+++ b/cc/trees/layer_tree_host_common_unittest.cc
@@ -9845,6 +9845,45 @@ TEST_F(LayerTreeHostCommonTest, LargeTransformTest) {
   EXPECT_TRUE(root_in_rsll);
 }
 
+TEST_F(LayerTreeHostCommonTest, CurrentlyRunningOpacityAnimationsTrackingTest) {
+  const gfx::Transform identity_matrix;
+  scoped_refptr<Layer> root = Layer::Create();
+  scoped_refptr<LayerWithForcedDrawsContent> animated =
+      make_scoped_refptr(new LayerWithForcedDrawsContent());
+  root->AddChild(animated);
+
+  host()->SetRootLayer(root);
+
+  SetLayerPropertiesForTesting(root.get(), identity_matrix, gfx::Point3F(),
+                               gfx::PointF(), gfx::Size(100, 100), true, false);
+  SetLayerPropertiesForTesting(animated.get(), identity_matrix, gfx::Point3F(),
+                               gfx::PointF(), gfx::Size(20, 20), true, false);
+
+  root->SetForceRenderSurfaceForTesting(true);
+  animated->SetOpacity(0.f);
+
+  scoped_refptr<AnimationPlayer> player =
+      AnimationPlayer::Create(AnimationIdProvider::NextPlayerId());
+  timeline()->AttachPlayer(player);
+  player->AttachElement(animated->id());
+
+  AddOpacityTransitionToPlayer(player.get(), 10.0, 0.f, 1.f, false);
+  ExecuteCalculateDrawPropertiesWithPropertyTrees(root.get());
+
+  EffectTree& tree = root->layer_tree_host()->property_trees()->effect_tree;
+  EffectNode* node = tree.Node(animated->effect_tree_index());
+  EXPECT_TRUE(node->data.is_currently_animating_opacity);
+
+  root->layer_tree_host()->AnimateLayers(
+      base::TimeTicks::FromInternalValue(std::numeric_limits<int64_t>::max()));
+  node = tree.Node(animated->effect_tree_index());
+  EXPECT_TRUE(node->data.is_currently_animating_opacity);
+
+  player->AbortAnimations(TargetProperty::OPACITY, false /*needs_completion*/);
+  node = tree.Node(animated->effect_tree_index());
+  EXPECT_FALSE(node->data.is_currently_animating_opacity);
+}
+
 TEST_F(LayerTreeHostCommonTest, SerializeScrollUpdateInfo) {
   LayerTreeHostCommon::ScrollUpdateInfo scroll;
   scroll.layer_id = 2;