ninja windows: Support magic idl build rules

test/win/gyptest-midl-rules.py

Index: test/win/gyptest-midl-rules.py
diff --git a/test/win/gyptest-midl-rules.py b/test/win/gyptest-midl-rules.py
new file mode 100644
index 0000000000000000000000000000000000000000..86a84e1650b043a8248cf8538aa6f0ac0ef07f4c
--- /dev/null
+++ b/test/win/gyptest-midl-rules.py
@@ -0,0 +1,22 @@
+#!/usr/bin/env python
+
+# Copyright (c) 2012 Google Inc. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+"""
+Handle default .idl build rules.
+"""
+
+import TestGyp
+
+import sys
+
+if sys.platform == 'win32':
+  test = TestGyp.TestGyp(formats=['msvs', 'ninja'])
+
+  CHDIR = 'idl-rules'
+  test.run_gyp('basic-idl.gyp', chdir=CHDIR)
+  test.build('basic-idl.gyp', test.ALL, chdir=CHDIR)
+
+  test.pass_test()