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..8241aa7384a9bc76c6d8fb99036df7b525fdca87 100644
--- a/cc/layers/draw_properties.h
+++ b/cc/layers/draw_properties.h
@@ -25,7 +25,6 @@ struct CC_EXPORT DrawProperties {
         target_space_transform_is_animating(false),
         screen_space_transform_is_animating(false),
         can_use_lcd_text(false),
-        is_clipped(false),
         render_target(nullptr),
         num_unclipped_descendants(0),
         layer_or_descendant_has_copy_request(false),
@@ -71,9 +70,6 @@ struct CC_EXPORT DrawProperties {
   // True if the layer can use LCD text.
   bool can_use_lcd_text;
 
-  // True if the layer needs to be clipped by clip_rect.
-  bool is_clipped;
-
   // The layer whose coordinate space this layer draws into. This can be
   // either the same layer (draw_properties_.render_target == this) or an
   // ancestor of this layer.