Compute if a layer is clipped outside CalcDrawProps

cc/layers/draw_properties.h

Index: cc/layers/draw_properties.h
diff --git a/cc/layers/draw_properties.h b/cc/layers/draw_properties.h
index 375d011f1cd9084172fc72c97553d52a86b1ce51..00eafaac6a64ddf4aef3b8e20bb290f710ec4e05 100644
--- a/cc/layers/draw_properties.h
+++ b/cc/layers/draw_properties.h
@@ -26,6 +26,7 @@ struct CC_EXPORT DrawProperties {
         screen_space_transform_is_animating(false),
         can_use_lcd_text(false),
         is_clipped(false),
+        is_clipped_from_property_trees(false),
         render_target(nullptr),
         num_unclipped_descendants(0),
         layer_or_descendant_has_copy_request(false),
@@ -73,6 +74,7 @@ struct CC_EXPORT DrawProperties {
 
   // True if the layer needs to be clipped by clip_rect.
   bool is_clipped;
+  bool is_clipped_from_property_trees;
 
   // The layer whose coordinate space this layer draws into. This can be
   // either the same layer (draw_properties_.render_target == this) or an