cc: Remove map lookup from RenderSurfaceImpl::EffectTreeIndex

cc/trees/draw_property_utils.cc

Index: cc/trees/draw_property_utils.cc
diff --git a/cc/trees/draw_property_utils.cc b/cc/trees/draw_property_utils.cc
index 80f3b09770cba17ef8b23597e99cd2f0cf84308a..7a216f0e10445e920cfc9068653f7ef00efe7439 100644
--- a/cc/trees/draw_property_utils.cc
+++ b/cc/trees/draw_property_utils.cc
@@ -1072,8 +1072,11 @@ void ComputeVisibleRects(LayerImpl* root_layer,
                                 can_render_to_separate_surface, layer);
     EffectNode* node =
         property_trees->effect_tree.Node(layer->effect_tree_index());
-    if (node->owning_layer_id == layer->id())
+    if (node->owning_layer_id == layer->id()) {
       node->render_surface = layer->render_surface();
+      if (node->render_surface)
+        node->render_surface->set_effect_tree_index(node->id);
+    }
 #if DCHECK_IS_ON()
     if (can_render_to_separate_surface)
       ValidateRenderSurfaceForLayer(layer);