Fuchsia: Adds support for Process.kill()

runtime/tests/vm/dart/hello_fuchsia_test.dart

 // 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.
 
 import "dart:async";
 import "dart:convert";
 import "dart:io";
 
 testAddressParse() async {
   print(new InternetAddress("1.0.2.3").rawAddress);
@@ skipping 379 matching lines @@
 
 void testProcessRunSync() {
   String exe = Platform.resolvedExecutable;
   print("Running $exe --version");
   var result = Process.runSync(exe, ["--version"]);
   print("$exe --version exited with code ${result.exitCode}");
   print("$exe --version had stdout = '${result.stdout}'");
   print("$exe --version had stderr = '${result.stderr}'");
 }
 
+Future testKill() async {
+  String exe = Platform.resolvedExecutable;
+  String script = Platform.script.path;
+  print("Running $exe $script");
+  Process p = await Process.start(exe, [script, "infinite-loop"]);
+  await new Future.delayed(const Duration(seconds: 1));
+  p.kill();
+  int code = await p.exitCode;
+  print("$exe $script exited with code $code");
+}
+
 Future testLs(String path) async {
   Stream<FileSystemEntity> stream = (new Directory(path)).list();
   await for (FileSystemEntity fse in stream) {
     print(fse.path);
   }
 }
 
 void testPlatformEnvironment() {
   Map<String, String> env = Platform.environment;
   for (String k in env.keys) {
@@ skipping 14 matching lines @@
   List<int> resultData = await destFile.readAsBytes();
   assert(data.length == resultData.length);
   for (int i = 0; i < data.length; i++) {
     assert(data[i] == resultData[i]);
   }
   await sourceFile.delete();
   await destFile.delete();
   await tmp.delete();
 }
 
-main() async {
+main(List<String> args) async {
+  if (args.length >= 1) {
+    if (args[0] == "infinite-loop") {
+      while (true);
+    }
+  }
+
   print("Hello, Fuchsia!");
 
   print("testAddressParse");
   await testAddressParse();
   print("testAddressParse done");
 
   print("testSimpleBind");
   await testSimpleBind();
   print("testSimpleBind done");
 
@@ skipping 26 matching lines @@
   print("testPlatformEnvironment done");
 
   print("testProcess");
   await testProcess();
   print("testProcess done");
 
   print("testProcessRunSync");
   testProcessRunSync();
   print("testProcessRunSync done");
 
+  print("testKill");
+  await testKill();
+  print("testKill done");
+
   print("testCopy");
   await testCopy();
   print("testCopy done");
 
   print("Goodbyte, Fuchsia!");
 }