Alternative fix for the js-interop crash.

pkg/compiler/lib/src/compiler.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 dart2js.compiler_base;
 
 import 'dart:async' show
     EventSink,
     Future;
 
@@ skipping 177 matching lines @@
 
   final bool useFrequencyNamer;
 
   /// When `true` emits URIs in the reflection metadata.
   final bool preserveUris;
 
   final bool enableTypeAssertions;
   final bool enableUserAssertions;
   final bool trustTypeAnnotations;
   final bool trustPrimitives;
+  final bool trustJSInteropTypeAnnotations;
   final bool disableTypeInferenceFlag;
   final Uri deferredMapUri;
   final bool dumpInfo;
   final bool useContentSecurityPolicy;
   final bool enableExperimentalMirrors;
   final bool enableAssertMessage;
 
   /**
    * The maximum size of a concrete type before it widens to dynamic during
    * concrete type inference.
@@ skipping 215 matching lines @@
     compilationFailedInternal = value;
   }
 
   /// Set by the backend if real reflection is detected in use of dart:mirrors.
   bool disableTypeInferenceForMirrors = false;
 
   Compiler({this.enableTypeAssertions: false,
             this.enableUserAssertions: false,
             this.trustTypeAnnotations: false,
             this.trustPrimitives: false,
+            this.trustJSInteropTypeAnnotations: false,
             bool disableTypeInferenceFlag: false,
             this.maxConcreteTypeSize: 5,
             this.enableMinification: false,
             this.preserveUris: false,
             this.enableNativeLiveTypeAnalysis: false,
             bool emitJavaScript: true,
             bool dart2dartMultiFile: false,
             bool generateSourceMap: true,
             bool analyzeAllFlag: false,
             bool analyzeOnly: false,
@@ skipping 1649 matching lines @@
     if (_otherDependencies == null) {
       _otherDependencies = new Setlet<Element>();
     }
     _otherDependencies.add(element.implementation);
   }
 
   Iterable<Element> get otherDependencies {
     return _otherDependencies != null ? _otherDependencies : const <Element>[];
   }
 }