Add secure sockets to dart:io

runtime/bin/tls_socket_patch.dart

Index: runtime/bin/tls_socket_patch.dart
diff --git a/runtime/bin/tls_socket_patch.dart b/runtime/bin/tls_socket_patch.dart
new file mode 100644
index 0000000000000000000000000000000000000000..caa986be10e3b64239326f2bbc8ad13c3b19ef4d
--- /dev/null
+++ b/runtime/bin/tls_socket_patch.dart
@@ -0,0 +1,48 @@
+// 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.
+
+patch class TlsSocket {
+  /* patch */ static void setCertificateDatabase(String pkcertDirectory)
+      native "TlsSocket_SetCertificateDatabase";
+}
+
+
+patch class TlsFilter {
+  /* patch */ factory TlsFilter() => new _TlsFilter();
+}
+
+
+/**
+ * _TlsFilter wraps a filter that encrypts and decrypts data travelling
+ * over a TLS encrypted socket.  The filter also handles the handshaking
+ * and certificate verification.
+ *
+ * The filter exposes its input and output buffers as Dart objects that
+ * are backed by an external C array of bytes, so that both Dart code and
+ * native code can access the same data.
+ */
+class _TlsFilter extends NativeFieldWrapperClass1 implements TlsFilter {
+  _TlsFilter() {
+    buffers = new List<_TlsExternalBuffer>(_TlsSocket.kNumBuffers);
+    for (int i = 0; i < _TlsSocket.kNumBuffers; ++i) {
+      buffers[i] = new _TlsExternalBuffer();
+    }
+  }
+
+  void connect(String hostName) native "TlsSocket_Connect";
+
+  void destroy() native "TlsSocket_Destroy";
+
+  void handshake() native "TlsSocket_Handshake";
+
+  void init() native "TlsSocket_Init";
+
+  int processBuffer(int bufferIndex) native "TlsSocket_ProcessBuffer";
+
+  void registerHandshakeCallbacks(Function startHandshakeHandler,
+                                  Function finishHandshakeHandler)
+      native "TlsSocket_RegisterHandshakeCallbacks";
+
+  List<_TlsExternalBuffer> buffers;
+}