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

sdk/lib/_internal/pub_generated/lib/src/source/path.dart

Index: sdk/lib/_internal/pub_generated/lib/src/source/path.dart
diff --git a/sdk/lib/_internal/pub/lib/src/source/path.dart b/sdk/lib/_internal/pub_generated/lib/src/source/path.dart
similarity index 85%
copy from sdk/lib/_internal/pub/lib/src/source/path.dart
copy to sdk/lib/_internal/pub_generated/lib/src/source/path.dart
index 8786968a81df58f3662b0724855cad6ce15f9694..d6f7b8c0c70a9ce04e576216835edb1cc805533e 100644
--- a/sdk/lib/_internal/pub/lib/src/source/path.dart
+++ b/sdk/lib/_internal/pub_generated/lib/src/source/path.dart
@@ -37,8 +37,7 @@ class PathSource extends Source {
   Future<Pubspec> doDescribe(PackageId id) {
     return new Future.sync(() {
       var dir = _validatePath(id.name, id.description);
-      return new Pubspec.load(dir, systemCache.sources,
-          expectedName: id.name);
+      return new Pubspec.load(dir, systemCache.sources, expectedName: id.name);
     });
   }
 
@@ -52,7 +51,10 @@ class PathSource extends Source {
   Future get(PackageId id, String symlink) {
     return new Future.sync(() {
       var dir = _validatePath(id.name, id.description);
-      createPackageSymlink(id.name, dir, symlink,
+      createPackageSymlink(
+          id.name,
+          dir,
+          symlink,
           relative: id.description["relative"]);
     });
   }
@@ -69,20 +71,20 @@ class PathSource extends Source {
   /// A path coming from a pubspec is a simple string. From a lock file, it's
   /// an expanded {"path": ..., "relative": ...} map.
   dynamic parseDescription(String containingPath, description,
-                           {bool fromLockFile: false}) {
+      {bool fromLockFile: false}) {
     if (fromLockFile) {
       if (description is! Map) {
         throw new FormatException("The description must be a map.");
       }
 
       if (description["path"] is! String) {
-        throw new FormatException("The 'path' field of the description must "
-            "be a string.");
+        throw new FormatException(
+            "The 'path' field of the description must " "be a string.");
       }
 
       if (description["relative"] is! bool) {
-        throw new FormatException("The 'relative' field of the description "
-            "must be a boolean.");
+        throw new FormatException(
+            "The 'relative' field of the description " "must be a boolean.");
       }
 
       return description;
@@ -100,12 +102,11 @@ class PathSource extends Source {
       // system aren't allowed. This can happen if a hosted or git dependency
       // has a path dependency.
       if (containingPath == null) {
-        throw new FormatException('"$description" is a relative path, but this '
-            'isn\'t a local pubspec.');
+        throw new FormatException(
+            '"$description" is a relative path, but this ' 'isn\'t a local pubspec.');
       }
 
-      description = p.normalize(
-          p.join(p.dirname(containingPath), description));
+      description = p.normalize(p.join(p.dirname(containingPath), description));
     }
 
     return {
@@ -150,8 +151,9 @@ class PathSource extends Source {
     if (dirExists(dir)) return dir;
 
     if (fileExists(dir)) {
-      fail('Path dependency for package $name must refer to a directory, '
-           'not a file. Was "$dir".');
+      fail(
+          'Path dependency for package $name must refer to a directory, '
+              'not a file. Was "$dir".');
     }
 
     throw new PackageNotFoundException(