Adding --no-nacl to gn disables nonsfi and sfi nacl from building.

examples/BUILD.gn

Index: examples/BUILD.gn
diff --git a/examples/BUILD.gn b/examples/BUILD.gn
index 89e9cfcc22fa74f0bb7dc5ac3061cd888b520cae..1c4a13a8c9ec06f1440cb1722e674cd68beb10a5 100644
--- a/examples/BUILD.gn
+++ b/examples/BUILD.gn
@@ -2,6 +2,7 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import("//build/config/nacl/config.gni")
 import("//build/config/ui.gni")
 
 # Collection of examples which are currently capable of being built as pexes.
@@ -77,7 +78,7 @@ group("examples") {
     deps += [ "//examples/python" ]
   }
 
-  if ((is_linux || is_android) && !is_asan) {
+  if (mojo_use_nacl && (is_linux || is_android) && !is_asan) {
     deps += [ ":portable_examples(//build/toolchain/nacl:newlib_pnacl)" ]
   }
 }