Don't use `LinkedList` in the core libraries anymore.

sdk/lib/web_gl/dart2js/web_gl_dart2js.dart

 /**
  * 3D programming in the browser.
  */
 library dart.dom.web_gl;
 
-import 'dart:collection';
+import 'dart:collection' hide LinkedList, LinkedListEntry;
 import 'dart:_internal' show FixedLengthListMixin;
 import 'dart:html';
 import 'dart:html_common';
 import 'dart:_native_typed_data';
 import 'dart:typed_data';
 import 'dart:_js_helper'
     show Creates, JSName, Native, Returns, convertDartClosureToJS;
 import 'dart:_foreign_helper' show JS;
 import 'dart:_interceptors' show Interceptor, JSExtendableArray;
 // DO NOT EDIT - unless you are editing documentation as per:
@@ skipping 6890 matching lines @@
 
 @DocsEditable()
 @DomName('WebGLRenderingContextBase')
 @Experimental() // untriaged
 abstract class _WebGLRenderingContextBase extends Interceptor {
   // To suppress missing implicit constructor warnings.
   factory _WebGLRenderingContextBase._() {
     throw new UnsupportedError("Not supported");
   }
 }