Fix noSuchMethod handling of methods that are also extension methods. Fix noSuchMethod handling of …

pkg/dev_compiler/tool/input_sdk/private/ddc_runtime/runtime.dart

 // Copyright (c) 2015, 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._runtime;
 
 import 'dart:async';
 import 'dart:collection';
 
 import 'dart:_foreign_helper' show JS, JSExportName, rest, spread;
 import 'dart:_interceptors' show JSArray;
 import 'dart:_js_helper'
     show
         AssertionErrorWithMessage,
         BooleanConversionAssertionError,
         CastErrorImplementation,
         getTraceFromException,
         Primitives,
         TypeErrorImplementation,
         StrongModeCastError,
         StrongModeErrorImplementation,
         StrongModeTypeError,
         SyncIterable;
+import 'dart:_internal' as _internal;
 
 part 'classes.dart';
 part 'rtti.dart';
 part 'types.dart';
 part 'errors.dart';
 part 'generators.dart';
 part 'operations.dart';
 part 'utils.dart';
 
 @JSExportName('global')
 final global_ = JS('', 'typeof window == "undefined" ? global : window');
 final JsSymbol = JS('', 'Symbol');