Add support for javascript incompatibility warnings.

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.
 
 # WARNING:
 # Tests using the multitest feature where failure is expected should *also* be
 # listed in tests/lib/analyzer/analyze_tests.status without the "standalone"
 # prefix.
 
 package/invalid_uri_test: Fail, OK # CompileTimeErrors intentionally
 
 issue14236_test: Pass # Do not remove this line. It serves as a marker for Issue 14516 comment #4.
 
+javascript_compatibility_errors_test/none: Fail, OK  # Not possible to exclude or annotate with '/// none:'
+
 [ $runtime == vm ]
 package/package_isolate_test: Fail # Issue 12474
 
 [ $runtime == vm && $checked ]
 # These tests have type errors on purpose.
 io/process_invalid_arguments_test: Fail, OK
 io/directory_invalid_arguments_test: Fail, OK
 io/file_invalid_arguments_test: Fail, OK
 io/internet_address_invalid_arguments_test: Fail, OK
 io/socket_invalid_arguments_test: Fail, OK
@@ skipping 50 matching lines @@
 debugger/*: Skip # Do not run standalone vm debugger tests with dart2js.
 left_shift_bit_and_op_test: Skip # Integers exceed dart2js precision.
 pow_test: Skip # Precision > 53 bits.
 double_smi_comparison_test: Skip # Precision > 53 bits.
 http_launch_test: Skip
 javascript_int_overflow_test: Skip
 javascript_int_overflow_literal_test: Skip
 oom_error_stacktrace_test: RuntimeError, OK # (OOM on JS may produce a stacktrace).
 vmservice/*: Skip # Do not run standalone vm service tests with dart2js.
 issue14236_test: Skip # dart2js does not deal with Script snapshots.
+javascript_compatibility_errors_test: Skip
+javascript_compatibility_warnings_test: Skip
 
 [ $compiler == dart2js && $jscl ]
 assert_test: RuntimeError, OK # Assumes unspecified fields on the AssertionError.
 deoptimization_test: RuntimeError, OK # Requires bigint.
 out_of_memory_test: RuntimeError, OK # d8 handles much larger arrays than Dart VM.
 io/arguments_test: CompileTimeError, OK # Cannot pass arguments to d8.
 
 [ $compiler == dart2js && $runtime == none ]
 io/arguments_test: Fail # DartOptions not supported by dart2js, and issue 14200.
 medium_integer_test: Pass # The test only fails at runtime, not at compilation.
@@ skipping 36 matching lines @@
 [ $compiler == dartanalyzer || $compiler == dart2analyzer ]
 io/directory_invalid_arguments_test: StaticWarning
 io/process_invalid_arguments_test: StaticWarning
 io/raw_secure_server_socket_argument_test: StaticWarning
 io/secure_socket_argument_test: StaticWarning
 io/stdout_bad_argument_test: StaticWarning
 package/package1_test: StaticWarning
 package/package_test: StaticWarning
 typed_data_test: StaticWarning
 typed_data_view_test: StaticWarning
+javascript_compatibility_errors_test: Skip
+javascript_compatibility_warnings_test: Skip