pkg/docgen: update markdown to 0.5.1

third_party/pkg/markdown/lib/src/html_renderer.dart

Index: third_party/pkg/markdown/lib/src/html_renderer.dart
diff --git a/third_party/pkg/markdown/lib/src/markdown/html_renderer.dart b/third_party/pkg/markdown/lib/src/html_renderer.dart
similarity index 70%
rename from third_party/pkg/markdown/lib/src/markdown/html_renderer.dart
rename to third_party/pkg/markdown/lib/src/html_renderer.dart
index 5494394f36872b799bcd6efbd5febbc799c4b950..97b900b5881ea0a2eded1c74f2a8729389b13bc2 100644
--- a/third_party/pkg/markdown/lib/src/markdown/html_renderer.dart
+++ b/third_party/pkg/markdown/lib/src/html_renderer.dart
@@ -2,7 +2,27 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-part of markdown;
+library markdown.html_renderer;
+
+import 'ast.dart';
+import 'document.dart';
+
+/// Converts the given string of markdown to HTML.
+String markdownToHtml(String markdown, {inlineSyntaxes, linkResolver,
+    bool inlineOnly: false}) {
+  var document = new Document(inlineSyntaxes: inlineSyntaxes,
+      linkResolver: linkResolver);
+
+  if (inlineOnly) {
+    return renderToHtml(document.parseInline(markdown));
+  } else {
+    // Replace windows line endings with unix line endings, and split.
+    var lines = markdown.replaceAll('\r\n','\n').split('\n');
+    document.parseRefLinks(lines);
+    var blocks = document.parseLines(lines);
+    return renderToHtml(blocks);
+  }
+}
 
 String renderToHtml(List<Node> nodes) => new HtmlRenderer().render(nodes);