Fix undefined method errors adding no-op stubs for methods needed by dart2js but irrelevant in ddc.…

tool/input_sdk/private/interceptors.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 dart._interceptors;
 
 import 'dart:collection';
 import 'dart:_internal' hide Symbol;
 import 'dart:_js_helper';
 import 'dart:_foreign_helper' show JS;
@@ skipping 84 matching lines @@
  * Interceptor for unclassified JavaScript objects, typically objects with a
  * non-trivial prototype chain.
  *
  * This class also serves as a fallback for unknown JavaScript exceptions.
  */
 class UnknownJavaScriptObject extends JavaScriptObject {
   const UnknownJavaScriptObject();
 
   String toString() => JS('String', 'String(#)', this);
 }
+
+// Obsolete in dart dev compiler. Added only so that the same version of
+// dart:html can be used in dart2js an dev compiler.
+// Warning: calls to these methods need to be removed before custom elements
+// and cross-frame dom objects behave correctly in ddc.

[vsm, 2016/04/20 23:11:00]

Can you file bugs on custom elements and cross-frame?

[Jacob, 2016/04/21 01:02:39]

Done.

+findInterceptorConstructorForType(Type type) { }
+findConstructorForNativeSubclassType(Type type, String name) { }
+getNativeInterceptor(object) {}
+setDispatchProperty(object, value) {}