cc : Add LayerToPropertyTreeIndices map to PropertyTrees

cc/trees/layer_tree_impl.cc

Index: cc/trees/layer_tree_impl.cc
diff --git a/cc/trees/layer_tree_impl.cc b/cc/trees/layer_tree_impl.cc
index 7f2cb3adbe8f03550cd168e0ba4674e0e21a8286..f55e8c2644d8c141a494b7bb626aac98cf5abad4 100644
--- a/cc/trees/layer_tree_impl.cc
+++ b/cc/trees/layer_tree_impl.cc
@@ -488,6 +488,33 @@ void LayerTreeImpl::AddToOpacityAnimationsMap(int id, float opacity) {
   opacity_animations_map_[id] = opacity;
 }
 
+void LayerTreeImpl::UpdateLayerToPropertyTreeIndicesMap(
+    int id,
+    int tree_index,
+    PropertyTrees::Types tree_type) {
+  PropertyTreeIndices& indices = layer_to_property_tree_indices_map_[id];
+  switch (tree_type) {
+    case PropertyTrees::Types::TRANSFORM_TREE:
+      indices.transform_tree_index = tree_index;
+      break;
+    case PropertyTrees::Types::CLIP_TREE:
+      indices.clip_tree_index = tree_index;
+      break;
+    case PropertyTrees::Types::SCROLL_TREE:
+      indices.scroll_tree_index = tree_index;
+      break;
+    case PropertyTrees::Types::EFFECT_TREE:
+      indices.effect_tree_index = tree_index;
+      break;
+    default:
+      break;
+  }
+}
+
+void LayerTreeImpl::RemoveFromLayerToPropertyTreeIndicesMap(int id) {
+  layer_to_property_tree_indices_map_.erase(id);
+}
+
 LayerTreeImpl::ElementLayers LayerTreeImpl::GetMutableLayers(
     uint64_t element_id) {
   auto iter = element_layers_map_.find(element_id);
@@ -2104,11 +2131,11 @@ void LayerTreeImpl::ScrollAnimationAbort(bool needs_completion) {
       needs_completion);
 }
 
-void LayerTreeImpl::ResetAllChangeTracking(PropertyTrees::ResetFlags flag) {
+void LayerTreeImpl::ResetAllChangeTracking(PropertyTrees::Types type) {
   layers_that_should_push_properties_.clear();
   for (auto* layer : *this)
     layer->ResetChangeTracking();
-  property_trees_.ResetAllChangeTracking(flag);
+  property_trees_.ResetAllChangeTracking(type);
 }
 
 }  // namespace cc