More test as slow.

tests/co19/co19-dart2js.status

 # 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.
 
 [ $compiler == dart2js && $runtime == jsshell ]
 LibTest/core/List/sort_A01_t04: Fail, Pass, Timeout # Must be a bug in jsshell, test sometimes times out.
 
 [ $compiler == dart2js && $checked && $runtime == ie9 ]
 LibTest/core/Uri/encodeComponent_A01_t02: Skip
 LibTest/core/Uri/encodeFull_A01_t02: Skip
@@ skipping 107 matching lines @@
 LibTest/core/Uri/Uri_A06_t03: Slow, Pass
 Language/13_Statements/09_Switch_A09_t01: RuntimeError # Issue 16089
 
 [ $compiler == dart2js ]
 LibTest/core/int/operator_GT_A01_t01: RuntimeError, OK # co19 issue 200
 LibTest/core/int/operator_LT_A01_t01: RuntimeError, OK # co19 issue 200
 LibTest/core/int/operator_addition_A01_t01: RuntimeError, OK # co19 issue 200
 LibTest/core/int/toDouble_A01_t01: RuntimeError, OK # co19 issue 200
 
 LibTest/core/List/sort_A01_t06: Slow, Pass # Slow tests that needs extra time to finish.
+LibTest/collection/LinkedList/add_A01_t01: Pass, Slow # Slow tests that needs extra time to finish.
 
 LibTest/core/List/getRange_A03_t01: RuntimeError, OK # Tests that fail because they use the legacy try-catch syntax. co19 issue 184.
 
 Language/07_Classes/6_Constructors/1_Generative_Constructors_A13_t01: RuntimeError, OK # These tests need to be updated for new optional parameter syntax and semantics, co19 issue 258:
 
 LibTest/isolate/SendPort/send_A02_t04: RuntimeError, OK # co19 issue 293 Passes on IE
 
 LibTest/core/RegExp/firstMatch_A01_t01: RuntimeError, OK # co19 issue 294
 LibTest/core/RegExp/Pattern_semantics/firstMatch_Term_A04_t01: RuntimeError, OK # co19 issue 294
 
@@ skipping 102 matching lines @@
 LibTest/core/int/operator_remainder_A01_t03: RuntimeError, OK # Leg only has double.
 LibTest/core/int/operator_truncating_division_A01_t02: RuntimeError, OK # Leg only has double.
 LibTest/core/int/remainder_A01_t01: RuntimeError, OK # Requires big int.
 LibTest/core/int/remainder_A01_t03: RuntimeError, OK # Leg only has double.
 LibTest/core/int/toDouble_A01_t01: RuntimeError, OK # Requires big int.
 LibTest/core/int/toRadixString_A01_t01: RuntimeError, OK # Bad test: uses Expect.fail, Expect.throws, assumes case of result, and uses unsupported radixes.
 
 [ $compiler == dart2js && $runtime == ie9 ]
 Language/12_Expressions/00_Object_Identity/1_Object_Identity_A05_t02: RuntimeError # co19-roll r607: Please triage this failure
 Language/12_Expressions/17_Getter_Invocation_A07_t02: RuntimeError # co19-roll r607: Please triage this failure
-LibTest/collection/LinkedList/add_A01_t01: Pass, Timeout  # co19-roll r607: Please triage this failure
 LibTest/core/Uri/Uri_A06_t03: Timeout # Issue 13511
 LibTest/math/cos_A01_t01: Fail # co19 issue 44
 
 #
 # The following tests are failing. Please add the error message
 # (either a compiler error or exception message). The error messages
 # may sometime be out of date.
 #
 [ $compiler == dart2js ]
 Language/07_Classes/6_Constructors/1_Generative_Constructors_A13_t01: RuntimeError # compiler cancelled: cannot resolve type T
@@ skipping 396 matching lines @@
 LibTest/convert/JsonEncoder/convert_A01_t01: RuntimeError # co19-roll r667: Please triage this failure
 
 LibTest/math/pow_A04_t01: fail # co19-roll r587: Please triage this failure
 LibTest/math/pow_A14_t01: fail # co19-roll r587: Please triage this failure
 LibTest/math/pow_A16_t01: fail # co19-roll r587: Please triage this failure
 
 LibTest/async/Stream/handleError_A04_t01: RuntimeError # co19-roll r641: Please triage this failure
 LibTest/async/Stream/listen_A05_t01: RuntimeError # co19-roll r641: Please triage this failure
 LibTest/convert/JsonCodec/encode_A01_t01: RuntimeError # co19-roll r641: Please triage this failure
 LibTest/convert/JsonCodec/encode_A01_t02: RuntimeError # co19-roll r641: Please triage this failure