Unify Date.fromString and support more Iso 8601.

tests/co19/co19-leg.status

 # Copyright (c) 2011, 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.
 
 prefix co19
 
 [ $component == leg && $system == macos ]
 LibTest/core/Math/acos_A01_t01: Fail
 LibTest/core/Math/asin_A01_t01: Fail
 LibTest/core/Math/atan_A01_t01: Fail
@@ skipping 194 matching lines @@
 # Time outs on the bots.
 LibTest/core/List/sort_A01_t05: Skip # Times out.
 LibTest/core/List/sort_A01_t06: Skip # Times out.
 
 
 Language/10_Expressions/01_Constants_A17_t02: Skip # Times out.
 Language/10_Expressions/01_Constants_A17_t01: Skip # Times out.
 
 
 # Issues with co19 test suite.
-LibTest/core/Date/Date.fromString_A01_t02: Fail, OK # Undocumented behavior.
-LibTest/core/Date/Date.fromString_A01_t03: Fail, OK # Undocumented behavior.
-LibTest/core/Date/Date.fromString_A01_t04: Fail, OK # Undocumented behavior.
+LibTest/core/Date/Date.fromString_A01_t02: Fail, OK # co19 issue 88.
+LibTest/core/Date/Date.fromString_A01_t04: Fail, OK # co19 issue 88.
 LibTest/core/Date/Date_A01_t01: Fail, OK # Generates bad date and expect exact print string.
 LibTest/core/Date/year_A01_t01: Fail, OK # Requires big int.
 LibTest/core/List/sort_A01_t02: Fail, OK # No method List.copyFrom.
 LibTest/core/List/sort_A01_t03: Fail, OK # No method List.copyFrom.
 LibTest/core/Match/pattern_A01_t01: Fail, OK # Bad test, allMatches return an Iterable.
 LibTest/core/Math/exp_A01_t01: Fail, OK # TODO(floitsch): Review.
 LibTest/core/Math/parseInt_A01_t01: Fail, OK # Requires big int.
 LibTest/core/Math/pow_A01_t01: Fail, OK # Bad test (uses x.pow(y), not Math.pow(x, y)).
 LibTest/core/Math/pow_A11_t01: Fail, OK # TODO(floitsch): Review.
 LibTest/core/Math/pow_A13_t01: Fail, OK # TODO(floitsch): Review.
@@ skipping 37 matching lines @@
 
 
 LangGuideTest/02_Language_Constructs/02_11_Exceptions/02_11_Exceptions_A08_t04: Fail # SsaBuilder.visitContinueStatement not implemented
 LangGuideTest/02_Language_Constructs/02_11_Exceptions/02_11_Exceptions_A09_t04: Fail # SsaBuilder.visitContinueStatement not implemented
 LangGuideTest/02_Language_Constructs/02_5_Meaning_of_Names/02_5_Meaning_of_Names_A02_t01: Fail # SsaBuilder.visitIdentifier on non-this
 Language/06_Functions/06_Functions_A01_t04: Fail # switch cases are not implemented
 Language/06_Functions/2_Formal_Parameters/2_Named_Optional_Formals_A01_t01: Fail # CompileTimeConstantHandler non-primitive list-entries not implemented
 Language/07_Classes/8_Superclasses/1_Inheritance_and_Overriding_A02_t03: Fail # SsaBuilder.visitIdentifier on non-this
 Language/13_Types/5_Function_Types_A02_t03: Fail # Cannot find value
 LibTest/core/Date/Date.fromEpoch_A01_t02: Fail # Expect.fail('Exception expected with the passed null value of the timeZone')
-LibTest/core/Date/Date.fromString_A05_t01: Fail # Expect.fail('Some exception is expected')
+LibTest/core/Date/toString_A02_t01: Fail # Test is out of date. See co19 issue 86.
 LibTest/core/Expect/throws_A02_t01: Fail # Bad code generation.
 LibTest/core/FallThroughError/toString_A01_t02: Fail # switch cases are not implemented
 LibTest/core/Isolate/port_A01_t01: Fail # Cannot find value
 LibTest/core/Isolate/spawn_A01_t01: Fail # Cannot find value
 LibTest/core/Isolate/spawn_A01_t03: Fail # Cannot find value
 LibTest/core/Match/str_A01_t01: Fail # NoSuchMethodException : method not found: 'get length'
 LibTest/core/RegExp/Pattern_semantics/firstMatch_CharacterClassEscape_A03_t01: Fail # switch cases are not implemented
 LibTest/core/RegExp/Pattern_semantics/firstMatch_CharacterClassEscape_A04_t01: Fail # switch cases are not implemented
 LibTest/core/RegExp/Pattern_semantics/firstMatch_CharacterClassEscape_A05_t01: Fail # switch cases are not implemented
 LibTest/core/RegExp/Pattern_semantics/firstMatch_CharacterClassEscape_A06_t01: Fail # switch cases are not implemented
@@ skipping 483 matching lines @@
 Language/11_Statements/10_Return_A04_t02: Fail, OK # @compile-error
 Language/11_Statements/10_Return_A04_t03: Fail, OK # @compile-error
 Language/11_Statements/11_Labels_A03_t05: Fail, OK # @compile-error
 Language/11_Statements/12_Break_A02_t03: Fail, OK # @compile-error
 Language/11_Statements/12_Break_A02_t04: Fail, OK # @compile-error
 Language/11_Statements/13_Continue_A02_t07: Fail, OK # @compile-error
 Language/11_Statements/13_Continue_A02_t16: Fail, OK # @compile-error
 Language/11_Statements/15_Assert_A01_t05: Fail, OK # @compile-error
 Language/13_Types/1_Static_Types_A02_t08: Fail, OK # @compile-error
 Language/13_Types/7_Type_Void_A01_t09: Fail, OK # @compile-error