Enable pnacl by default

ppapi/native_client/src/trusted/plugin/service_runtime.cc

Index: ppapi/native_client/src/trusted/plugin/service_runtime.cc
diff --git a/ppapi/native_client/src/trusted/plugin/service_runtime.cc b/ppapi/native_client/src/trusted/plugin/service_runtime.cc
index f908f8bdbf3c23edef1b07136169af56c9dbd523..005576af95253c09853a2540052a913be0a1d1ac 100644
--- a/ppapi/native_client/src/trusted/plugin/service_runtime.cc
+++ b/ppapi/native_client/src/trusted/plugin/service_runtime.cc
@@ -354,9 +354,9 @@ void PluginReverseInterface::OpenManifestEntry_MainThreadContinuation(
       nacl::MutexLocker take(&mu_);
       *p->op_complete_ptr = true;  // done...
       p->file_info->desc = -1;  // but failed.
-      p->error_info->SetReport(ERROR_PNACL_NOT_ENABLED,
-                               "ServiceRuntime: GetPnaclFd failed -- pnacl not "
-                               "enabled with --enable-pnacl.");
+      p->error_info->SetReport(ERROR_PNACL_DISABLED,
+                               "ServiceRuntime: GetPnaclFd failed -- pnacl "
+                               "disabled with --disable-pnacl.");
       NaClXCondVarBroadcast(&cv_);
       return;
     }