[dart:io] Move Platform.ansiSupported to {Stdin,Stdout}.supportsAnsiEscapes

runtime/bin/stdio_unsupported.cc

 // Copyright (c) 2016, 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.
 
 #if defined(DART_IO_DISABLED)
 
 #include "bin/builtin.h"
 #include "bin/dartutils.h"
 #include "include/dart_api.h"
 
@@ skipping 23 matching lines @@
       DartUtils::NewDartArgumentError("Stdin unsupported on this platform"));
 }
 
 
 void FUNCTION_NAME(Stdin_SetLineMode)(Dart_NativeArguments args) {
   Dart_ThrowException(
       DartUtils::NewDartArgumentError("Stdin unsupported on this platform"));
 }
 
 
+void FUNCTION_NAME(Stdin_AnsiSupported)(Dart_NativeArguments args) {
+  Dart_ThrowException(
+      DartUtils::NewDartArgumentError("Stdin unsupported on this platform"));
+}
+
+
 void FUNCTION_NAME(Stdout_GetTerminalSize)(Dart_NativeArguments args) {
   Dart_ThrowException(
       DartUtils::NewDartArgumentError("Stdout unsupported on this platform"));
 }
 
+
+void FUNCTION_NAME(Stdout_AnsiSupported)(Dart_NativeArguments args) {
+  Dart_ThrowException(
+      DartUtils::NewDartArgumentError("Stdout unsupported on this platform"));
+}
+
 }  // namespace bin
 }  // namespace dart
 
 #endif  // defined(DART_IO_DISABLED)