cc: Move background filters to the effect tree

cc/layers/layer_impl_test_properties.h

Index: cc/layers/layer_impl_test_properties.h
diff --git a/cc/layers/layer_impl_test_properties.h b/cc/layers/layer_impl_test_properties.h
index 9cca459be0b93b71512f677e032abb49e4f5cf18..3e97b54e1d1fb9eab1c42880c48d6ad55629ea98 100644
--- a/cc/layers/layer_impl_test_properties.h
+++ b/cc/layers/layer_impl_test_properties.h
@@ -11,6 +11,7 @@
 #include "base/memory/ptr_util.h"
 #include "cc/layers/layer_collections.h"
 #include "cc/layers/layer_position_constraint.h"
+#include "cc/output/filter_operations.h"
 #include "ui/gfx/geometry/point3_f.h"
 
 namespace cc {
@@ -37,6 +38,7 @@ struct CC_EXPORT LayerImplTestProperties {
   int num_descendants_that_draw_content;
   size_t num_unclipped_descendants;
   float opacity;
+  FilterOperations background_filters;
   LayerPositionConstraint position_constraint;
   gfx::Point3F transform_origin;
   LayerImpl* scroll_parent;