Revert "Parts must start with 'part of'" and "Attempt to fix VM build"

dart/pkg/dartdoc/lib/markdown.dart

Index: dart/pkg/dartdoc/lib/markdown.dart
diff --git a/dart/pkg/dartdoc/lib/markdown.dart b/dart/pkg/dartdoc/lib/markdown.dart
index 8a3bd559456f77c97f24d7661807203b99fd986d..b58b1fd0dbc24799af0280cd0ebd85ce91375921 100644
--- a/dart/pkg/dartdoc/lib/markdown.dart
+++ b/dart/pkg/dartdoc/lib/markdown.dart
@@ -3,13 +3,13 @@
 // BSD-style license that can be found in the LICENSE file.
 
 /// Parses text in a markdown-like format and renders to HTML.
-library markdown;
+#library('markdown');
 
 // TODO(rnystrom): Use "package:" URL (#4968).
-part 'src/markdown/ast.dart';
-part 'src/markdown/block_parser.dart';
-part 'src/markdown/html_renderer.dart';
-part 'src/markdown/inline_parser.dart';
+#source('src/markdown/ast.dart');
+#source('src/markdown/block_parser.dart');
+#source('src/markdown/html_renderer.dart');
+#source('src/markdown/inline_parser.dart');
 
 /// Converts the given string of markdown to HTML.
 String markdownToHtml(String markdown) {