Implement Double.{toString, toStringAsExponential, toStringAsPrecision}

tests/language/language.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.
 
 # This directory contains tests that are intended to show the
 # current state of the language.
 
 # In order to maintain maximum test coverage for all builds,
 # please use the following procedure to mark a test
 # failed on architectures other than the one you are working on.
@@ skipping 264 matching lines @@
 RichardsTest: Fail
 TypedMessageTest: Fail # Bug 5246195
 StringEscape1NegativeTest: Skip
 
 
 [ $component == frogsh ]
 IntrinsifiedMethodsTest: Fail # Issue 1470
 ArithmeticTest: Fail # Issue 1470
 
 [ $component == frog || $component == frogium || $component == webdriver ]
-ToStringAsFixedTest: Fail # fails due to rounding in constant propagation
+DoubleToStringAsFixedTest: Fail # fails due to rounding in constant propagation and -0.0.
 
 # This set of four test components (frog, frogsh, frogium, and webdriver) all
 # consume frog output, so if frog is generating the incorrect code, chances are
 # it will fail on all of these components.
 #
 # Further explanation:
 # frog: frog compiler, run using the VM
 # frogsh: self-hosted frog compiler
 # frogium: Dart code compiled with frog VM running under DumpRenderTree
 # webdriver: Dart code compiled with frog VM running on an actual browser
@@ skipping 21 matching lines @@
 GetSetSyntaxTest/11: Fail # Issue 1571
 GetSetSyntaxTest/12: Fail # Issue 1571
 GetSetSyntaxTest/13: Fail # Issue 1571
 GetSetSyntaxTest/14: Fail # Issue 1571
 GetSetSyntaxTest/15: Fail # Issue 1571
 ImplementTypeParameterNegativeTest: Skip # Issue 887
 FactoryImplementationTest: Fail # Issue 523
 PseudoKWTest: Fail  # Issue 356
 NamingTest: Fail    # Issue 356
 DuplicateImplementsTest: Skip   # Issue 976
+DoubleToString: Fail  # Prints "3" instead of "3.0".
 ThirdTest: Fail # Issue 1511
 TryCatchSyntaxTest/08: Fail
 TryCatchSyntaxTest/09: Fail
 CondExprTest: Fail
 
 SavannahTest: Skip # TODO(jimhug): Seems flaky on some configs - investigate.
 
 # VM or DartC specific tests not to be run by Frog. See language.status
 *VMTest: Skip
 *VMNegativeTest: Skip
@@ skipping 193 matching lines @@
 [ $component == frog && $mode == debug ]
 ConstructorRedirect1NegativeTest: Skip # Undiagnosed infinite loop.
 ConstructorRedirect2NegativeTest: Skip # Undiagnosed infinite loop.
 
 [ $arch == simarm ]
 *: Skip
 
 [ $arch == arm ]
 *: Skip