Revert "Rename internal library dart:_collection-dev to dart:_internal."

tools/dom/templates/html/dartium/html_dartium.darttemplate

 // 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.
 
 // DO NOT EDIT
 // Auto-generated dart:html library.
 
 /**
  * HTML elements and other resources for web-based applications that need to
  * interact with the browser and the DOM (Document Object Model).
@@ skipping 15 matching lines @@
  * and run its built-in examples.
  *
  * * For even more examples, see
  * [Dart HTML5 Samples](https://github.com/dart-lang/dart-html5-samples)
  * on Github.
  */
 library dart.dom.html;
 
 import 'dart:async';
 import 'dart:collection';
-import 'dart:_collection-dev' hide Symbol, deprecated;
+import 'dart:_internal' hide Symbol, deprecated;
 import 'dart:html_common';
 import 'dart:indexed_db';
 import 'dart:isolate';
 import "dart:convert";
 import 'dart:math';
 // TODO(vsm): Remove this when we can do the proper checking in
 // native code for custom elements.
 import 'dart:mirrors';
 import 'dart:nativewrappers';
 import 'dart:typed_data';
@@ skipping 64 matching lines @@
 /**
  * Root node for all content in a web page.
  */
 HtmlDocument get document {
   if (_document != null) {
     return _document;
   }
   _document = window.document;
   return _document;
 }