Implement CSS: scroll-boundary-behavior

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 fe4c1f860091da069198d02a1e8fbccc29ac676b..c8fd24533b69422dbf73c8c6111dd1f221b3e260 100644
--- a/cc/layers/layer_impl_test_properties.h
+++ b/cc/layers/layer_impl_test_properties.h
@@ -10,6 +10,7 @@
 
 #include "base/memory/ptr_util.h"
 #include "cc/base/filter_operations.h"
+#include "cc/input/scroll_boundary_behavior.h"
 #include "cc/layers/layer_collections.h"
 #include "cc/layers/layer_position_constraint.h"
 #include "cc/layers/layer_sticky_position_constraint.h"
@@ -58,6 +59,7 @@ struct CC_EXPORT LayerImplTestProperties {
   LayerImpl* parent;
   bool user_scrollable_horizontal = true;
   bool user_scrollable_vertical = true;
+  ScrollBoundaryBehavior scroll_boundary_behavior;
 };
 
 }  // namespace cc