Add an untrusted NaCl build target for jsoncpp.

third_party/jsoncpp/jsoncpp.gypi

Index: third_party/jsoncpp/jsoncpp.gypi
diff --git a/third_party/jsoncpp/jsoncpp.gypi b/third_party/jsoncpp/jsoncpp.gypi
new file mode 100644
index 0000000000000000000000000000000000000000..02203b1548c387a90bdc6a7ebed1b494510845a9
--- /dev/null
+++ b/third_party/jsoncpp/jsoncpp.gypi
@@ -0,0 +1,38 @@
+# Copyright (c) 2013 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+{
+  'target_defaults': {
+    'defines': [
+      'JSON_USE_EXCEPTION=0',
+    ],
+    'sources': [
+      'source/include/json/assertions.h',
+      'source/include/json/autolink.h',
+      'source/include/json/config.h',
+      'source/include/json/features.h',
+      'source/include/json/forwards.h',
+      'source/include/json/json.h',
+      'source/include/json/reader.h',
+      'overrides/include/json/value.h',
+      'source/include/json/writer.h',
+      'source/src/lib_json/json_batchallocator.h',
+      'source/src/lib_json/json_reader.cpp',
+      'source/src/lib_json/json_tool.h',
+      'overrides/src/lib_json/json_value.cpp',
+      'source/src/lib_json/json_writer.cpp',
+    ],
+    'include_dirs': [
+      'overrides/include/',
+      'source/include/',
+      'source/src/lib_json/',
+    ],
+    'direct_dependent_settings': {
+      'include_dirs': [
+        'overrides/include/',
+        'source/include/',
+      ],
+    },
+  },
+}