Revert "Signal handling."

runtime/bin/process_patch.dart

 // 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.
 
 patch class _WindowsCodePageDecoder {
   /* patch */ static String _decodeBytes(List<int> bytes)
       native "SystemEncodingToString";
 }
 
 
@@ skipping 53 matching lines @@
                                          workingDirectory,
                                          environment,
                                          includeParentEnvironment,
                                          runInShell,
                                          stdoutEncoding,
                                          stderrEncoding);
   }
 }
 
 
-List<_SignalController> _signalControllers = new List(32);
-
-
-class _SignalController {
-  final ProcessSignal signal;
-
-  StreamController _controller;
-  var _id;
-
-  _SignalController(this.signal) {
-    _controller = new StreamController.broadcast(
-        onListen: _listen,
-        onCancel: _cancel);
-  }
-
-  Stream<ProcessSignal> get stream => _controller.stream;
-
-  void _listen() {
-    var id = _setSignalHandler(signal._signalNumber);
-    if (id is! int) {
-      _controller.addError(
-          new SignalException("Failed to listen for $signal", id));
-      return;
-    }
-    _id = id;
-    var socket = new _RawSocket(new _NativeSocket.watch(id));
-    socket.listen((event) {
-      if (event == RawSocketEvent.READ) {
-        var bytes = socket.read();
-        for (int i = 0; i < bytes.length; i++) {
-          _controller.add(signal);
-        }
-      }
-    });
-  }
-
-  void _cancel() {
-    if (_id != null) {
-      _clearSignalHandler(signal._signalNumber);
-      _id = null;
-    }
-  }
-
-  /* patch */ static int _setSignalHandler(int signal)
-      native "Process_SetSignalHandler";
-  /* patch */ static int _clearSignalHandler(int signal)
-      native "Process_ClearSignalHandler";
-}
-
-
 patch class _ProcessUtils {
   /* patch */ static void _exit(int status) native "Process_Exit";
   /* patch */ static void _setExitCode(int status)
       native "Process_SetExitCode";
   /* patch */ static void _sleep(int millis) native "Process_Sleep";
   /* patch */ static int _pid(Process process) native "Process_Pid";
-  /* patch */ static Stream<ProcessSignal> _watchSignal(ProcessSignal signal) {
-    if (signal != ProcessSignal.SIGHUP &&
-        signal != ProcessSignal.SIGINT &&
-        (Platform.isWindows ||
-         (signal != ProcessSignal.SIGUSR1 &&
-          signal != ProcessSignal.SIGUSR2 &&
-          signal != ProcessSignal.SIGWINCH))) {
-      throw new SignalException(
-          "Listening for signal $signal is not supported");
-    }
-    if (_signalControllers[signal._signalNumber] == null) {
-      _signalControllers[signal._signalNumber] = new _SignalController(signal);
-    }
-    return _signalControllers[signal._signalNumber].stream;
-  }
 }
 
 
 class _ProcessStartStatus {
   int _errorCode;  // Set to OS error code if process start failed.
   String _errorMessage;  // Set to OS error message if process start failed.
 }
 
 
 class _ProcessImpl extends NativeFieldWrapperClass1 implements Process {
@@ skipping 377 matching lines @@
   const _ProcessResult(int this.pid,
                        int this.exitCode,
                        this.stdout,
                        this.stderr);
 
   final int pid;
   final int exitCode;
   final stdout;
   final stderr;
 }