port TemplateBinding to ed3266266e751b5ab1f75f8e0509d0d5f0ef35d8

pkg/template_binding/lib/src/input_bindings.dart

Index: pkg/template_binding/lib/src/input_bindings.dart
diff --git a/pkg/template_binding/lib/src/input_bindings.dart b/pkg/template_binding/lib/src/input_bindings.dart
index fc89dc5d1ae1d32e6e188afd6128a4fbd2e9505d..8e5b3b0c806be6557cc30b706673464dad33e1a4 100644
--- a/pkg/template_binding/lib/src/input_bindings.dart
+++ b/pkg/template_binding/lib/src/input_bindings.dart
@@ -148,11 +148,12 @@ class _SelectBinding extends _InputBinding {
     // Instead we use scheduleMicrotask. Each <template repeat> needs a delay of
     // 2:
     //   * once to happen after the child _TemplateIterator is created
-    //   * once to be after _TemplateIterator.inputs CompoundBinding resolve
+    //   * once to be after _TemplateIterator's CompoundPathObserver resolve
     // And then we need to do this delay sequence twice:
     //   * once for OPTGROUP
     //   * once for OPTION.
     // The resulting 2 * 2 is our maxRetries.
+    //
     // TODO(jmesserly): a much better approach would be to find the nested
     // <template> and wait on some future that completes when it has expanded.
     var maxRetries = 4;