Remove =List in JS, use JSExtendableArray instead.

sdk/lib/_internal/lib/isolate_helper.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.
 
 library _isolate_helper;
 
 import 'dart:async';
 import 'dart:collection' show Queue, HashMap;
 import 'dart:isolate';
 import 'dart:_js_helper' show convertDartClosureToJS,
                               Null;
 import 'dart:_foreign_helper' show DART_CLOSURE_TO_JS,
                                    JS,
                                    JS_CREATE_ISOLATE,
                                    JS_CURRENT_ISOLATE_CONTEXT,
                                    JS_CURRENT_ISOLATE,
                                    JS_SET_CURRENT_ISOLATE,
                                    IsolateContext;
+import 'dart:_interceptors' show JSExtendableArray;
 
 ReceivePort lazyPort;
 
 class CloseToken {
   /// This token is sent from [IsolateSink]s to [IsolateStream]s to ask them to
   /// close themselves.
   const CloseToken();
 }
 
 class JsIsolateSink extends EventSink<dynamic> implements IsolateSink {
@@ skipping 419 matching lines @@
     var pattern, matches;
 
     // This pattern matches V8, Chrome, and Internet Explorer stack
     // traces that look like this:
     // Error
     //     at methodName (URI:LINE:COLUMN)
     pattern = JS('',
                  r'new RegExp("^ *at [^(]*\\((.*):[0-9]*:[0-9]*\\)$", "m")');
 
 
-    matches = JS('=List|Null', '#.match(#)', stack, pattern);
+    matches = JS('JSExtendableArray|Null', '#.match(#)', stack, pattern);
     if (matches != null) return JS('String', '#[1]', matches);
 
     // This pattern matches Firefox stack traces that look like this:
     // methodName@URI:LINE
     pattern = JS('', r'new RegExp("^[^@]*@(.*):[0-9]*$", "m")');
 
-    matches = JS('=List|Null', '#.match(#)', stack, pattern);
+    matches = JS('JSExtendableArray|Null', '#.match(#)', stack, pattern);
     if (matches != null) return JS('String', '#[1]', matches);
 
     throw new UnsupportedError('Cannot extract URI from "$stack"');
   }
 
   static computeGlobalThis() => JS('', 'function() { return this; }()');
 
   /**
    * Assume that [e] is a browser message event and extract its message data.
    * We don't import the dom explicitly so, when workers are disabled, this
@@ skipping 935 matching lines @@
         JS('void', '#.clearInterval(#)', globalThis, _handle);
       }
       _handle = null;
     } else {
       throw new UnsupportedError("Canceling a timer.");
     }
   }
 }
 
 bool hasTimer() => JS('', '#.setTimeout', globalThis) != null;