Revert "Use native async/await support in pub."

sdk/lib/_internal/pub_generated/lib/src/validator/compiled_dartdoc.dart

Index: sdk/lib/_internal/pub_generated/lib/src/validator/compiled_dartdoc.dart
diff --git a/sdk/lib/_internal/pub/lib/src/validator/compiled_dartdoc.dart b/sdk/lib/_internal/pub_generated/lib/src/validator/compiled_dartdoc.dart
similarity index 68%
copy from sdk/lib/_internal/pub/lib/src/validator/compiled_dartdoc.dart
copy to sdk/lib/_internal/pub_generated/lib/src/validator/compiled_dartdoc.dart
index 10b351fb0563f6d91790b007081f3c0f9a68619e..99900d8916c94a1a5d0127dfcad72eba8bc8727e 100644
--- a/sdk/lib/_internal/pub/lib/src/validator/compiled_dartdoc.dart
+++ b/sdk/lib/_internal/pub_generated/lib/src/validator/compiled_dartdoc.dart
@@ -16,7 +16,7 @@ import '../validator.dart';
 /// output.
 class CompiledDartdocValidator extends Validator {
   CompiledDartdocValidator(Entrypoint entrypoint)
-    : super(entrypoint);
+      : super(entrypoint);
 
   Future validate() {
     return new Future.sync(() {
@@ -26,18 +26,16 @@ class CompiledDartdocValidator extends Validator {
 
         // Look for tell-tale Dartdoc output files all in the same directory.
         var files = [
-          entry,
-          path.join(dir, "index.html"),
-          path.join(dir, "styles.css"),
-          path.join(dir, "dart-logo-small.png"),
-          path.join(dir, "client-live-nav.js")
-        ];
+            entry,
+            path.join(dir, "index.html"),
+            path.join(dir, "styles.css"),
+            path.join(dir, "dart-logo-small.png"),
+            path.join(dir, "client-live-nav.js")];
 
         if (files.every((val) => fileExists(val))) {
-          warnings.add("Avoid putting generated documentation in "
-                  "${path.relative(dir)}.\n"
-              "Generated documentation bloats the package with redundant "
-                  "data.");
+          warnings.add(
+              "Avoid putting generated documentation in " "${path.relative(dir)}.\n"
+                  "Generated documentation bloats the package with redundant " "data.");
         }
       }
     });