Add recipe for testing recipe simulation.

scripts/slave/recipes/infra/recipe_simulation.py

+# 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.
+"""A continious builder for build repo which simulates recipes."""
+
+DEPS = [
+  'bot_update',
+  'gclient',
+  'recipe_engine/path',
+  'recipe_engine/properties',
+  'recipe_engine/step',
+]
+
+
+def RunSteps(api):
+  api.gclient.set_config('build')
+  api.bot_update.ensure_checkout(force=True)
+  recipes_py = api.path['checkout'].join('scripts', 'slave', 'recipes.py')
+  api.step('recipe fetch deps', [recipes_py, 'fetch'])
+  api.step('recipe simulation test', [recipes_py, 'simulation_test'])
+
+
+def GenTests(api):
+  yield (
+      api.test('normal') +
+      api.properties.generic(
+          mastername='chromium.tools.build',
+          buildername='recipe simulation tester',
+          revision='deadbeaf',
+      )
+  )