Fix x.runtimeType for native classes

sdk/lib/_internal/compiler/implementation/lib/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 _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 240 matching lines @@
 
   List<E> toList({ bool growable: true }) =>
       new List<E>.from(this, growable: growable);
 
   Set<E> toSet() => new Set<E>.from(this);
 
   Iterator<E> get iterator => new ListIterator<E>(this);
 
   int get hashCode => Primitives.objectHashCode(this);
 
-  Type get runtimeType {
-    // Call getRuntimeTypeString to get the name including type arguments.
-    return new TypeImpl(getRuntimeTypeString(this));
-  }
-
   int get length => JS('int', r'#.length', this);
 
   void set length(int newLength) {
     if (newLength is !int) throw new ArgumentError(newLength);
     if (newLength < 0) throw new RangeError.value(newLength);
     checkGrowable(this, 'set length');
     JS('void', r'#.length = #', this, newLength);
   }
 
   E operator [](int index) {
@@ skipping 14 matching lines @@
   }
 }
 
 /**
  * Dummy subclasses that allow the backend to track more precise
  * information about arrays through their type.
  */
 class JSMutableArray extends JSArray {}
 class JSFixedArray extends JSMutableArray {}
 class JSExtendableArray extends JSMutableArray {}