cc: Directly use property trees to calculate clip rect

cc/trees/layer_tree_settings.h

Index: cc/trees/layer_tree_settings.h
diff --git a/cc/trees/layer_tree_settings.h b/cc/trees/layer_tree_settings.h
index 2aadbbc90cb4d71c58ea8dfccfebf7180c8186b0..166556d6474808d7053afc8d3f8ab5b82eb308a7 100644
--- a/cc/trees/layer_tree_settings.h
+++ b/cc/trees/layer_tree_settings.h
@@ -83,6 +83,7 @@ class CC_EXPORT LayerTreeSettings {
   bool ignore_root_layer_flings;
   size_t scheduled_raster_task_limit;
   bool use_occlusion_for_tile_prioritization;
+  bool verify_clip_tree_calculations;
   bool image_decode_tasks_enabled;
   bool wait_for_beginframe_interval;
   bool abort_commit_before_output_surface_creation;