cc : Track opacity animation changes on effect tree

cc/trees/property_tree.cc

Index: cc/trees/property_tree.cc
diff --git a/cc/trees/property_tree.cc b/cc/trees/property_tree.cc
index b6be2aa9ed57a3440825f5ef961e82866a35d9e3..4386c028739734831a14829c47e7f7d1dff8806e 100644
--- a/cc/trees/property_tree.cc
+++ b/cc/trees/property_tree.cc
@@ -454,6 +454,7 @@ EffectNodeData::EffectNodeData()
       double_sided(false),
       is_drawn(true),
       has_animated_opacity(false),
+      is_currently_animating_opacity(false),
       effect_changed(false),
       num_copy_requests_in_subtree(0),
       transform_id(0),
@@ -471,6 +472,8 @@ bool EffectNodeData::operator==(const EffectNodeData& other) const {
          hidden_by_backface_visibility == other.hidden_by_backface_visibility &&
          double_sided == other.double_sided && is_drawn == other.is_drawn &&
          has_animated_opacity == other.has_animated_opacity &&
+         is_currently_animating_opacity ==
+             other.is_currently_animating_opacity &&
          effect_changed == other.effect_changed &&
          num_copy_requests_in_subtree == other.num_copy_requests_in_subtree &&
          transform_id == other.transform_id && clip_id == other.clip_id &&
@@ -489,6 +492,7 @@ void EffectNodeData::ToProtobuf(proto::TreeNode* proto) const {
   data->set_double_sided(double_sided);
   data->set_is_drawn(is_drawn);
   data->set_has_animated_opacity(has_animated_opacity);
+  data->set_is_currently_animating_opacity(is_currently_animating_opacity);
   data->set_effect_changed(effect_changed);
   data->set_num_copy_requests_in_subtree(num_copy_requests_in_subtree);
   data->set_transform_id(transform_id);
@@ -509,6 +513,7 @@ void EffectNodeData::FromProtobuf(const proto::TreeNode& proto) {
   double_sided = data.double_sided();
   is_drawn = data.is_drawn();
   has_animated_opacity = data.has_animated_opacity();
+  is_currently_animating_opacity = data.is_currently_animating_opacity();
   effect_changed = data.effect_changed();
   num_copy_requests_in_subtree = data.num_copy_requests_in_subtree();
   transform_id = data.transform_id();