Add functionality to pppapi TCPSocket to support secure sockets in flash

ppapi/api/private/ppb_tcp_socket_private.idl

Index: ppapi/api/private/ppb_tcp_socket_private.idl
diff --git a/ppapi/api/private/ppb_tcp_socket_private.idl b/ppapi/api/private/ppb_tcp_socket_private.idl
index ae5cba207dc60b471f21b40af202e5dab3229660..385dee6b4fe526fdf2a3301ac5ff1027f10e6b75 100644
--- a/ppapi/api/private/ppb_tcp_socket_private.idl
+++ b/ppapi/api/private/ppb_tcp_socket_private.idl
@@ -8,7 +8,8 @@
  */
 
 label Chrome {
-  M17 = 0.3
+  M17 = 0.3,
+  M20 = 0.4
 };
 
 /**
@@ -77,6 +78,28 @@ interface PPB_TCPSocket_Private {
                        [in] PP_CompletionCallback callback);
 
   /**
+   * Returns the server's <code>PPB_X509Certificate_Private</code> for a socket
+   * connection if an SSL connection has been established using
+   * <code>SSLHandshake</code>. If no SSL connection has been established, a
+   * null resource is returned.
+   */
+  [version=0.4]
+  PP_Resource GetServerCertificate([in] PP_Resource tcp_socket);
+
+  /**
+   * NOTE: This function is not implemented and will return
+   * <code>PP_FALSE</code>.
+   * Adds a trusted/untrusted chain building certificate to be used for this
+   * connection. The <code>certificate</code> must be a
+   * <code>PPB_X509Certificate_Private<code>. <code>PP_TRUE</code> is returned
+   * upon success.
+   */
+  [version=0.4]
+  PP_Bool AddChainBuildingCertificate([in] PP_Resource tcp_socket,
+                                      [in] PP_Resource certificate,
+                                      [in] PP_Bool is_trusted);
+
+  /**
    * Reads data from the socket. The size of |buffer| must be at least as large
    * as |bytes_to_read|. May perform a partial read. Returns the number of bytes
    * read or an error code. If the return value is 0, then it indicates that