Add the ability to secure an already established raw socket connection

sdk/lib/io/socket.dart

Index: sdk/lib/io/socket.dart
diff --git a/sdk/lib/io/socket.dart b/sdk/lib/io/socket.dart
index 1680f6b805f37c7bdcf360fb0842dac4bfec840b..81fb37758d436a51e2946b879ba5704524c57b68 100644
--- a/sdk/lib/io/socket.dart
+++ b/sdk/lib/io/socket.dart
@@ -165,6 +165,11 @@ abstract class RawSocket implements Stream<RawSocketEvent> {
   int get remotePort;
 
   /**
+   * Returns the host used to connect this socket.
+   */
+  String get host;
+
+  /**
    * Returns the remote host connected to by this socket.
    */
   String get remoteHost;
@@ -239,9 +244,25 @@ abstract class Socket implements Stream<List<int>>,
    */
   bool setOption(SocketOption option, bool enabled);
 
+  /**
+   * Returns the port used by this socket.
+   */
   int get port;
-  String get remoteHost;
+
+  /**
+   * Returns the remote port connected to by this socket.
+   */
   int get remotePort;
+
+  /**
+   * Returns the host used to connect this socket.
+   */
+  String get host;
+
+  /**
+   * Returns the remote host connected to by this socket.
+   */
+  String get remoteHost;
 }