Mojo + NaCl prototype.

mojo/mojo_variables.gypi

Index: mojo/mojo_variables.gypi
diff --git a/mojo/mojo_variables.gypi b/mojo/mojo_variables.gypi
index fa1d42dbd29d5105067e4cb3747dd807fe70418a..acb3a3fdbe0f923ba477452cb10beed71de23a2d 100644
--- a/mojo/mojo_variables.gypi
+++ b/mojo/mojo_variables.gypi
@@ -3,7 +3,7 @@
 # found in the LICENSE file.
 
 #
-# A set of GYP variables that are shared between mojo.gyp and mojo_base.gyp
+# A set of GYP variables that are shared between various mojo .gyp files.
 #
 {
   'variables': {
@@ -41,5 +41,12 @@
         'mojo_gles2_for_component': "../mojo/mojo_base.gyp:mojo_none",
       }],
     ],
+    'mojo_public_system_unittest_sources': [
+      'public/c/system/tests/core_unittest.cc',
+      'public/c/system/tests/core_unittest_pure_c.c',
+      'public/c/system/tests/macros_unittest.cc',
+      'public/cpp/system/tests/core_unittest.cc',
+      'public/cpp/system/tests/macros_unittest.cc',
+    ],
   },
 }