Add GetBoundAddress to PPB_UDPSocket_Private

ppapi/api/private/ppb_udp_socket_private.idl

Index: ppapi/api/private/ppb_udp_socket_private.idl
diff --git a/ppapi/api/private/ppb_udp_socket_private.idl b/ppapi/api/private/ppb_udp_socket_private.idl
index 4babbb4a4dbd915a962d354947fd3f986b5d4823..24f4f2722efe695e412e77a2da10af98021d77b6 100644
--- a/ppapi/api/private/ppb_udp_socket_private.idl
+++ b/ppapi/api/private/ppb_udp_socket_private.idl
@@ -22,7 +22,10 @@ interface PPB_UDPSocket_Private {
    */
   PP_Bool IsUDPSocket([in] PP_Resource resource_id);
 
-  /* Creates a socket and binds to the address given by |addr|. */
+  /* Creates a socket and binds to the address given by |addr|.
+   * Returns the port number that the socket is bound to on
+   * success, 0 on failure
+   */
   int32_t Bind([in] PP_Resource udp_socket,
                [in] PP_NetAddress_Private addr,

[yzshen1, 2012/01/27 18:41:07]

- Isn't the port information included in |addr| itself?
Am I missing anything?

- The int32_t is a value from pp_errors.h. All non-positive values are reserved.
0 means PP_OK here.

                [in] PP_CompletionCallback callback);