Merge commit '7621e2f8dec938cf48181c8b10afc9b01f444e68' into beta

submodules/Display/Source/UITracingLayerView.swift

@@ -0,0 +1,28 @@
+import Foundation
+import UIKit
+import AsyncDisplayKit
+
+open class UITracingLayerView: UIView {
+    private var scheduledWithLayout: (() -> Void)?
+    
+    open func schedule(layout f: @escaping () -> Void) {
+        self.scheduledWithLayout = f
+        self.setNeedsLayout()
+    }
+    
+    override open var autoresizingMask: UIView.AutoresizingMask {
+        get {
+            return []
+        } set(value) {
+        }
+    }
+    
+    override open func layoutSubviews() {
+        super.layoutSubviews()
+        
+        if let scheduledWithLayout = self.scheduledWithLayout {
+            self.scheduledWithLayout = nil
+            scheduledWithLayout()
+        }
+    }
+}