Don't run web_socket_protocol_processor_test with dart2js.

tests/standalone/standalone.status

 # Copyright (c) 2013, 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.
 
 package/invalid_uri_test: Fail, OK # Fails intentionally
 
 [ $runtime == vm ]
 # Temporarily disabled until the test scripts are rewritten for
 # dart:io v2.
 io/skipping_dart2js_compilations_test: skip # Non-fatal process error.
@@ skipping 79 matching lines @@
 io/web_socket_protocol_processor_test: Skip  # dart:io unit test.
 
 io/process_exit_negative_test: Fail  # This is a compilation-time negative test.
 
 [ $compiler == dart2js ]
 number_identity_test: Skip # Bigints and int/double diff. not supported.
 typed_data_test: Skip # This is a VM test
 typed_array_test: Skip # This is a VM test
 float_array_test: Skip # This is a VM test
 int_array_test: Skip  # This is a VM test
+io/web_socket_protocol_processor_test: Skip  # Importing code with external keyword
 int_array_load_elimination_test: Skip  # This is a VM test
 medium_integer_test: Fail, OK # Test fails with JS number semantics: issue 1533.
 io/process_exit_negative_test: Fail, OK # relies on a static error that is a warning now.
 package/package_isolate_test: Skip # spawnUri does not work in dart2js. See issue 3051
 debugger/*: Skip # Do not run standalone vm debugger tests with dart2js.
 left_shift_bit_and_op_test: Skip # Integers exceed dart2js precision.
 
 [ $compiler == dart2js && $jscl ]
 assert_test: Fail, OK # Assumes unspecified fields on the AssertionError.
 byte_array_test: Fail, OK # ByteArray
@@ skipping 21 matching lines @@
 *: Skip
 
 [ $arch == simarm ]
 *: Skip
 
 [ $arch == mips ]
 *: Skip
 
 [ $arch == simmips ]
 *: Skip