This adds in the GYP files needed for our GYP build.

serializer/serializer.gyp

Index: serializer/serializer.gyp
===================================================================
--- serializer/serializer.gyp	(revision 0)
+++ serializer/serializer.gyp	(revision 0)
@@ -0,0 +1,39 @@
+# Copyright (c) 2009 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.
+
+{
+  'variables': {
+    'chromium_code': 1,
+  },
+  'includes': [
+    '../build/common.gypi',
+  ],
+  'target_defaults': {
+    'include_dirs': [
+      '..',
+      '../..',
+      '../../<(gtestdir)',
+    ],
+  },
+  'targets': [
+    {
+      'target_name': 'o3dSerializer',
+      'type': 'static_library',
+      'sources': [
+        'cross/serializer.cc',
+        'cross/serializer.h',
+        'cross/serializer_binary.cc',
+        'cross/serializer_binary.h',
+        'cross/version.h',
+      ],
+    },
+    {
+      'target_name': 'o3dSerializerTest',
+      'type': 'static_library',
+      'sources': [
+        'cross/serializer_test.cc',
+      ],
+    },
+  ],
+}