Revert "Move dart2js from sdk/lib/_internal/compiler to pkg/compiler"

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:async';
 
 import 'lib/metadata.dart';
 
 // TODO(rnystrom): Use "package:" URL (#4968).
-import '../../pkg/compiler/lib/src/mirrors/analyze.dart';
-import '../../pkg/compiler/lib/src/mirrors/source_mirrors.dart';
-import '../../pkg/compiler/lib/src/mirrors/mirrors_util.dart';
-import '../../pkg/compiler/lib/src/source_file_provider.dart';
+import '../../sdk/lib/_internal/compiler/implementation/mirrors/analyze.dart';
+import '../../sdk/lib/_internal/compiler/implementation/mirrors/source_mirrors.dart';
+import '../../sdk/lib/_internal/compiler/implementation/mirrors/mirrors_util.dart';
+import '../../sdk/lib/_internal/compiler/implementation/source_file_provider.dart';
 
 // TODO(amouravski): There is currently magic that looks at dart:* libraries
 // rather than the declared library names. This changed due to recent syntax
 // changes. We should only need to look at the library 'html'.
 final List<Uri> HTML_LIBRARY_URIS = [
     new Uri(scheme: 'dart', path: 'html'),
     new Uri(scheme: 'dart', path: 'indexed_db'),
     new Uri(scheme: 'dart', path: 'svg'),
     new Uri(scheme: 'dart', path: 'web_audio')];
 
@@ skipping 192 matching lines @@
       return members;
     }
 
     if (name.split('.').length != 2) {
       warn('invalid member name ${name}');
       return new Set();
     }
     return new Set.from([name]);
   }
 }