fix #30030, fix #27327 - fix tearoffs and various Object member bugs

pkg/dev_compiler/tool/input_sdk/private/js_array.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.
 
 part of dart._interceptors;
 
 /**
  * The interceptor class for [List]. The compiler recognizes this
  * class as an interceptor, and changes references to [:this:] to
  * actually use the receiver of the method, which is generated as an extra
@@ skipping 562 matching lines @@
         JS('int', '#', index) >= JS('int', '#.length', this) ||
         JS('int', '#', index) < 0) {
       throw diagnoseIndexError(this, index);
     }
     JS('void', r'#[#] = #', this, index, value);
   }
 
   Map<int, E> asMap() {
     return new ListMapView<E>(this);
   }
+
+  Type get runtimeType => wrapType(JS('', '#(#)', getGenericClass(List), E));
 }
 
 /**
  * Dummy subclasses that allow the backend to track more precise
  * information about arrays through their type. The CPA type inference
  * relies on the fact that these classes do not override [] nor []=.
  *
  * These classes are really a fiction, and can have no methods, since
  * getInterceptor always returns JSArray.  We should consider pushing the
  * 'isGrowable' and 'isMutable' checks into the getInterceptor implementation so
@@ skipping 35 matching lines @@
 
     if (_index >= length) {
       _current = null;
       return false;
     }
     _current = _iterable[_index];
     _index++;
     return true;
   }
 }