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

sdk/lib/_internal/pub_generated/test/descriptor/git.dart

Index: sdk/lib/_internal/pub_generated/test/descriptor/git.dart
diff --git a/sdk/lib/_internal/pub/test/descriptor/git.dart b/sdk/lib/_internal/pub_generated/test/descriptor/git.dart
similarity index 90%
copy from sdk/lib/_internal/pub/test/descriptor/git.dart
copy to sdk/lib/_internal/pub_generated/test/descriptor/git.dart
index 0ccf2e3d6835959abc81c8d6c3e70d1dc2b36e58..38ecdfa216774733a31592d2b01b7ceceb56bee0 100644
--- a/sdk/lib/_internal/pub/test/descriptor/git.dart
+++ b/sdk/lib/_internal/pub_generated/test/descriptor/git.dart
@@ -20,11 +20,9 @@ class GitRepoDescriptor extends DirectoryDescriptor {
   /// Creates the Git repository and commits the contents.
   Future create([String parent]) => schedule(() {
     return super.create(parent).then((_) {
-      return _runGitCommands(parent, [
-        ['init'],
-        ['add', '.'],
-        ['commit', '-m', 'initial commit']
-      ]);
+      return _runGitCommands(
+          parent,
+          [['init'], ['add', '.'], ['commit', '-m', 'initial commit']]);
     });
   }, 'creating Git repo:\n${describe()}');
 
@@ -34,10 +32,9 @@ class GitRepoDescriptor extends DirectoryDescriptor {
   /// [parent] defaults to [defaultRoot].
   Future commit([String parent]) => schedule(() {
     return super.create(parent).then((_) {
-      return _runGitCommands(parent, [
-        ['add', '.'],
-        ['commit', '-m', 'update']
-      ]);
+      return _runGitCommands(
+          parent,
+          [['add', '.'], ['commit', '-m', 'update']]);
     });
   }, 'committing Git repo:\n${describe()}');
 
@@ -70,7 +67,8 @@ class GitRepoDescriptor extends DirectoryDescriptor {
     };
 
     if (parent == null) parent = defaultRoot;
-    return git.run(args,
+    return git.run(
+        args,
         workingDir: path.join(parent, name),
         environment: environment);
   }