dart2js: fix dart2js crash when getRuntimeTypeArgument was not registered.

pkg/compiler/lib/src/js_backend/backend.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 js_backend;
 
 const VERBOSE_OPTIMIZER_HINTS = false;
 
 const bool USE_CPS_IR = const bool.fromEnvironment("USE_CPS_IR");
 
@@ skipping 2556 matching lines @@
     assert(registry.isForResolution);
     type = type.unalias(backend.compiler);
     registerBackendInstantiation(backend.compiler.boolClass, registry);
     bool inCheckedMode = backend.compiler.enableTypeAssertions;
     if (inCheckedMode) {
       registerBackendStaticInvocation(backend.getThrowRuntimeError(), registry);
     }
     if (type.isMalformed) {
       registerBackendStaticInvocation(backend.getThrowTypeError(), registry);
     }
-    if (!type.treatAsRaw || type.containsTypeVariables) {
+    if (!type.treatAsRaw || type.containsTypeVariables || type.isFunctionType) {
       // TODO(johnniwinther): Investigate why this is needed.
       registerBackendStaticInvocation(
           backend.getSetRuntimeTypeInfo(), registry);
       registerBackendStaticInvocation(
           backend.getGetRuntimeTypeInfo(), registry);
       backend.registerGetRuntimeTypeArgument(registry);
       if (inCheckedMode) {
         registerBackendStaticInvocation(backend.getAssertSubtype(), registry);
       }
       registerBackendStaticInvocation(backend.getCheckSubtype(), registry);
@@ skipping 93 matching lines @@
   }
 }
 
 /// Records that [constant] is used by the element behind [registry].
 class Dependency {
   final ConstantValue constant;
   final Element annotatedElement;
 
   const Dependency(this.constant, this.annotatedElement);
 }