cc: Move filters to the effect tree

cc/trees/occlusion_tracker.cc

Index: cc/trees/occlusion_tracker.cc
diff --git a/cc/trees/occlusion_tracker.cc b/cc/trees/occlusion_tracker.cc
index 93822ba68bd028703ee2abb2a9a92ac9a3010bfd..3b69c68318815065a5840b54e632fe6931ac250b 100644
--- a/cc/trees/occlusion_tracker.cc
+++ b/cc/trees/occlusion_tracker.cc
@@ -192,7 +192,7 @@ void OcclusionTracker::FinishedRenderTarget(const LayerImpl* finished_target) {
   if (surface->MaskLayer() || surface->draw_opacity() < 1 ||
       !finished_target->uses_default_blend_mode() ||
       target_is_only_for_copy_request ||
-      finished_target->filters().HasFilterThatAffectsOpacity()) {
+      surface->Filters().HasFilterThatAffectsOpacity()) {
     stack_.back().occlusion_from_outside_target.Clear();
     stack_.back().occlusion_from_inside_target.Clear();
   }