linux: Implement brightray's stub functions.

atom.gyp

@@ -153,6 +153,7 @@
       'common/crash_reporter/win/crash_service_main.h',
       'common/draggable_region.cc',
       'common/draggable_region.h',
+      'common/linux/application_info.cc',
       'common/node_bindings.cc',
       'common/node_bindings.h',
       'common/node_bindings_mac.cc',

common/linux/application_info.cc

@@ -0,0 +1,19 @@
+// Copyright (c) 2013 GitHub, Inc. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include <string>
+
+#include "common/atom_version.h"
+
+namespace brightray {
+
+std::string GetApplicationName() {
+  return "Atom-Shell";
+}
+
+std::string GetApplicationVersion() {
+  return ATOM_VERSION_STRING;
+}
+
+}  // namespace brightray