Seperate NaCl switches to their own file.

components/nacl_common.gypi

Index: components/nacl_common.gypi
diff --git a/components/nacl_common.gypi b/components/nacl_common.gypi
new file mode 100644
index 0000000000000000000000000000000000000000..7b0db6e0101b2227160f7d6344cae520ed063a16
--- /dev/null
+++ b/components/nacl_common.gypi
@@ -0,0 +1,41 @@
+# 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.
+
+{
+  'targets': [
+    {
+      'target_name': 'nacl_switches',
+      'type': 'static_library',
+      'sources': [
+        'nacl/common/nacl_switches.cc',
+        'nacl/common/nacl_switches.h',
+      ],
+      'include_dirs': [
+        '..',
+      ],
+    },
+  ],
+  'conditions': [
+    ['OS=="win" and target_arch=="ia32"', {
+      'targets': [
+        {
+          'target_name': 'nacl_switches_win64',
+          'type': 'static_library',
+          'sources': [
+            'nacl/common/nacl_switches.cc',
+            'nacl/common/nacl_switches.h',
+          ],
+          'include_dirs': [
+            '..',
+          ],
+          'configurations': {
+            'Common_Base': {
+              'msvs_target_platform': 'x64',
+            },
+          },
+        },
+      ],
+    }],
+  ],
+}