Add infra recipe module, use for updating Go DEPS

infra/bots/recipe_modules/run/api.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.
 
 
 # pylint: disable=W0201
 
 
 from recipe_engine import recipe_api
 
@@ skipping 97 matching lines @@
   path = os.path.join(src, pattern)
   for f in glob.glob(path):
     dst_path = os.path.join(dst, os.path.relpath(f, src))
     if not os.path.isdir(os.path.dirname(dst_path)):
       os.makedirs(os.path.dirname(dst_path))
     print 'Copying build product %%s to %%s' %% (f, dst_path)
     shutil.move(f, dst_path)
 ''' % str(BUILD_PRODUCTS_ISOLATE_WHITELIST),
         args=[src, dst],
         infra_step=True)
+
+  def with_retry(self, steptype, name, attempts, *args, **kwargs):
+    for attempt in xrange(attempts):
+      step_name = name
+      if attempt > 0:
+        step_name += ' (attempt %d)' % (attempt + 1)
+      try:
+        steptype(step_name, *args, **kwargs)
+        return
+      except self.m.step.StepFailure:
+        if attempt == attempts - 1:
+          raise