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

sdk/lib/web_gl/dartium/web_gl_dartium.dart

 /**
  * 3D programming in the browser.
  */
 library dart.dom.web_gl;
 
 import 'dart:async';
-import 'dart:collection';
+import 'dart:collection' hide LinkedList, LinkedListEntry;
 import 'dart:_internal';
 import 'dart:html';
 import 'dart:html_common';
 import 'dart:nativewrappers';
 import 'dart:typed_data';
 import 'dart:_blink' as _blink;
 import 'dart:js' as js;
 // DO NOT EDIT
 // Auto-generated dart:web_gl library.
 
@@ skipping 8438 matching lines @@
 
 @DocsEditable()
 @DomName('WebGLRenderingContextBase')
 @Experimental() // untriaged
 class _WebGLRenderingContextBase extends DartHtmlDomObject {
   // To suppress missing implicit constructor warnings.
   factory _WebGLRenderingContextBase._() {
     throw new UnsupportedError("Not supported");
   }
 }