Hook up the dartdoc tests to test.py, test.dart, and frog/presubmit.py.

utils/tests/dartdoc/src/markdown_tests.dart

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // 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.
 
 /// Unit tests for markdown.
 #library('markdown_tests');
 
-#import('../markdown.dart');
+#import('../../../dartdoc/markdown.dart');
 
 // TODO(rnystrom): Better path to unittest.
-#import('../../../client/testing/unittest/unittest_vm.dart');
+#import('../../../../client/testing/unittest/unittest_node.dart');
 
 /// Most of these tests are based on observing how showdown behaves:
 /// http://softwaremaniacs.org/playground/showdown-highlight/
 void main() {
   group('Paragraphs', () {
     validate('consecutive lines form a single paragraph', '''
         This is the first line.
         This is the second line.
         ''', '''
         <p>This is the first line.
@@ skipping 775 matching lines @@
 
     // If one string runs out of non-ignored strings, the other must too.
     if (i == a.length) return j == b.length;
     if (j == b.length) return i == a.length;
 
     if (a[i] != b[j]) return false;
     i++;
     j++;
   }
 }