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

build/nacl.gyp

Index: build/nacl.gyp
===================================================================
--- build/nacl.gyp	(revision 0)
+++ build/nacl.gyp	(revision 0)
@@ -0,0 +1,57 @@
+# 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,
+    'nacl_scons_dir': '../../third_party/native_client/googleclient/native_client/scons-out',
+  },
+  'includes': [
+    'common.gypi',
+  ],
+  'targets': [
+    {
+      'target_name': 'build_nacl',
+      'type': 'none',
+      'variables': {
+        'nacl_libs': [
+          'google_nacl_imc',
+          'google_nacl_imc_c',
+        ],
+        'nacl_lib_dir': '<(nacl_scons_dir)/<(CONFIGURATION)-<(OS)/lib',
+        'nacl_output_dir': '<(SHARED_INTERMEDIATE_DIR)/nacl_libs',
+      },
+      'actions': [
+        {
+          'action_name': 'build_nacl',
+          'inputs' : [
+            'build_nacl.py',
+          ],
+          'outputs': [
+            '<(nacl_output_dir)/google_nacl_imc<(LIBRARY_SUFFIX)',
+            '<(nacl_output_dir)/google_nacl_imc_c<(LIBRARY_SUFFIX)',
+            'dummy_file_that_never_gets_built_so_scons_always_runs',
+          ],
+          'action': [
+            'python',
+            '<@(_inputs)',
+            '--output="<(nacl_output_dir)"',
+            '--configuration="<(CONFIGURATION)"',
+            '--platform=<(OS)',
+            '<@(nacl_libs)',
+          ],
+        },
+      ],
+      'direct_dependent_settings': {
+        'include_dirs': [
+          '<(nacldir)',
+        ],
+        'libraries': [
+          '-l<(nacl_output_dir)/google_nacl_imc<(LIBRARY_SUFFIX)',
+          '-l<(nacl_output_dir)/google_nacl_imc_c<(LIBRARY_SUFFIX)',
+        ],
+      },
+    },
+  ],
+}