Reorganize dartdoc to new package layout.

utils/apidoc/html_diff.dart

 // Copyright (c) 2012, 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.
 
 /**
  * A script to assist in documenting the difference between the dart:html API
  * and the old DOM API.
  */
 #library('html_diff');
 
 #import('dart:coreimpl');
 #import('dart:io');
 
-#import('../../pkg/dartdoc/dartdoc.dart');
-#import('../../pkg/dartdoc/mirrors/mirrors.dart');
-#import('../../pkg/dartdoc/mirrors/mirrors_util.dart');
+// TODO(rnystrom): Use "package:" URL (#4968).
+#import('../../pkg/dartdoc/lib/dartdoc.dart');
+#import('../../pkg/dartdoc/lib/mirrors.dart');
+#import('../../pkg/dartdoc/lib/mirrors_util.dart');
 
 final HTML_LIBRARY_NAME = 'dart:html';
 
 /**
  * A class for computing a many-to-many mapping between the types and
  * members in `dart:html` and the MDN DOM types. This mapping is
  * based on two indicators:
  *
  *   1. Auto-detected wrappers. Most `dart:html` types correspond
  *      straightforwardly to a single `@domName` type, and
@@ skipping 10 matching lines @@
  * `@domName NAME(, NAME)*`, where the `NAME`s refer to the
  * `@domName` types/members that correspond to the
  * annotated `dart:html` type/member. `NAME`s on member annotations
  * can refer to either fully-qualified member names (e.g.
  * `Document.createElement`) or unqualified member names
  * (e.g. `createElement`).  Unqualified member names are assumed to
  * refer to members of one of the corresponding `@domName`
  * types.
  */
 class HtmlDiff {
-  /** 
+  /**
    * A map from `dart:html` members to the corresponding fully qualified
    * `@domName` member(s).
    */
   final Map<String, Set<String>> htmlToDom;
 
   /** A map from `dart:html` types to corresponding `@domName` types. */
   final Map<String, Set<String>> htmlTypesToDom;
 
   final CommentMap comments;
 
@@ skipping 166 matching lines @@
   Map<String, String> _getTags(String comment) {
     if (comment == null) return const <String, String>{};
     final re = const RegExp("@([a-zA-Z]+) ([^;]+)(?:;|\$)");
     final tags = <String, String>{};
     for (var m in re.allMatches(comment.trim())) {
       tags[m[1]] = m[2];
     }
     return tags;
   }
 }