Add SetProperty() in the PPB_Transport_Dev interface.

ppapi/thunk/ppb_transport_thunk.cc

Index: ppapi/thunk/ppb_transport_thunk.cc
diff --git a/ppapi/thunk/ppb_transport_thunk.cc b/ppapi/thunk/ppb_transport_thunk.cc
index cf573c51d84a39628982fc50c7d30de534933fe3..fcfd337e5b44fec81af53e6d98fbbdd2431c714a 100644
--- a/ppapi/thunk/ppb_transport_thunk.cc
+++ b/ppapi/thunk/ppb_transport_thunk.cc
@@ -36,6 +36,13 @@ PP_Bool IsWritable(PP_Resource transport) {
   return enter.object()->IsWritable();
 }
 
+int32_t SetConfig(PP_Resource transport, const char* config) {
+  EnterTransport enter(transport, true);
+  if (enter.failed())
+    return PP_ERROR_BADRESOURCE;
+  return enter.object()->SetConfig(config);
+}
+
 int32_t Connect(PP_Resource transport, PP_CompletionCallback callback) {
   EnterTransport enter(transport, true);
   if (enter.failed())
@@ -89,6 +96,7 @@ const PPB_Transport_Dev g_ppb_transport_thunk = {
   &Create,
   &IsTransport,
   &IsWritable,
+  &SetConfig,
   &Connect,
   &GetNextAddress,
   &ReceiveRemoteAddress,