Add git_cl recipe module.

recipe_modules/git_cl/api.py

Index: recipe_modules/git_cl/api.py
diff --git a/recipe_modules/git_cl/api.py b/recipe_modules/git_cl/api.py
new file mode 100644
index 0000000000000000000000000000000000000000..4bfae050b8c3f3701244a966be7538a344f5b077
--- /dev/null
+++ b/recipe_modules/git_cl/api.py
@@ -0,0 +1,13 @@
+# Copyright 2016 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.
+
+from recipe_engine import recipe_api
+
+class GitClApi(recipe_api.RecipeApi):
+  def __call__(self, name, args, **kwargs):

[tandrii(chromium), 2016/04/28 05:19:35]

how about (self, subcmd, args, name='git_cl ' + subcmd, **kwargs) signature?
using would be nicer:
self('description', ['flags and options'])

+    return self.m.step(name, [

[tandrii(chromium), 2016/04/28 05:19:35]

nit: hate to write this, but alignment is weird. Move [ to next line.

+        self.package_repo_resource('git_cl.py')] + args, **kwargs)
+
+  def description(self, args, **kwargs):
+    return self('git_cl description', ['description'] + args, **kwargs)