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

sdk/lib/_internal/pub_generated/lib/src/barback/web_socket_api.dart

Index: sdk/lib/_internal/pub_generated/lib/src/barback/web_socket_api.dart
diff --git a/sdk/lib/_internal/pub/lib/src/barback/web_socket_api.dart b/sdk/lib/_internal/pub_generated/lib/src/barback/web_socket_api.dart
similarity index 93%
copy from sdk/lib/_internal/pub/lib/src/barback/web_socket_api.dart
copy to sdk/lib/_internal/pub_generated/lib/src/barback/web_socket_api.dart
index a580a2c60c0f3b94f9499346fd46e8b5f080c24a..3d5d4e1cc9f9b625312f5f3d6ba8010f6f5bc3e8 100644
--- a/sdk/lib/_internal/pub/lib/src/barback/web_socket_api.dart
+++ b/sdk/lib/_internal/pub_generated/lib/src/barback/web_socket_api.dart
@@ -110,7 +110,8 @@ class WebSocketApi {
 
     return _environment.getAssetIdForUrl(url).then((id) {
       if (id == null) {
-        throw new json_rpc.RpcException(_Error.NOT_SERVED,
+        throw new json_rpc.RpcException(
+            _Error.NOT_SERVED,
             '"${url.host}:${url.port}" is not being served by pub.');
       }
 
@@ -118,7 +119,10 @@ class WebSocketApi {
       // see if assets exist, consider supporting implicit index.html at that
       // point.
 
-      var result = {"package": id.package, "path": id.path};
+      var result = {
+        "package": id.package,
+        "path": id.path
+      };
 
       // Map the line.
       // TODO(rnystrom): Right now, source maps are not supported and it just
@@ -186,11 +190,14 @@ class WebSocketApi {
 
     return _environment.getUrlsForAssetPath(assetPath).then((urls) {
       if (urls.isEmpty) {
-        throw new json_rpc.RpcException(_Error.NOT_SERVED,
+        throw new json_rpc.RpcException(
+            _Error.NOT_SERVED,
             'Asset path "$assetPath" is not currently being served.');
       }
 
-      var result = {"urls": urls.map((url) => url.toString()).toList()};
+      var result = {
+        "urls": urls.map((url) => url.toString()).toList()
+      };
 
       // Map the line.
       // TODO(rnystrom): Right now, source maps are not supported and it just
@@ -230,16 +237,19 @@ class WebSocketApi {
     }).catchError((error) {
       if (error is! OverlappingSourceDirectoryException) throw error;
 
-      var dir = pluralize("directory", error.overlappingDirectories.length,
+      var dir = pluralize(
+          "directory",
+          error.overlappingDirectories.length,
           plural: "directories");
-      var overlapping = toSentence(error.overlappingDirectories.map(
-          (dir) => '"$dir"'));
+      var overlapping =
+          toSentence(error.overlappingDirectories.map((dir) => '"$dir"'));
       print("data: ${error.overlappingDirectories}");
-      throw new json_rpc.RpcException(_Error.OVERLAPPING,
+      throw new json_rpc.RpcException(
+          _Error.OVERLAPPING,
           'Path "$rootDirectory" overlaps already served $dir $overlapping.',
           data: {
-            "directories": error.overlappingDirectories
-          });
+        "directories": error.overlappingDirectories
+      });
     });
   }
 
@@ -267,11 +277,14 @@ class WebSocketApi {
     var rootDirectory = _validateRelativePath(params, "path");
     return _environment.unserveDirectory(rootDirectory).then((url) {
       if (url == null) {
-        throw new json_rpc.RpcException(_Error.NOT_SERVED,
+        throw new json_rpc.RpcException(
+            _Error.NOT_SERVED,
             'Directory "$rootDirectory" is not bound to a server.');
       }
 
-      return {"url": url.toString()};
+      return {
+        "url": url.toString()
+      };
     });
   }
 
@@ -291,8 +304,7 @@ class WebSocketApi {
 
     if (!path.isWithin(".", pathString)) {
       throw new json_rpc.RpcException.invalidParams(
-          '"$key" cannot reach out of its containing directory. '
-          'Got "$pathString".');
+          '"$key" cannot reach out of its containing directory. ' 'Got "$pathString".');
     }
 
     return pathString;