Add infra recipe module, use for updating Go DEPS

infra/bots/recipes/swarm_RecreateSKPs.py

 # Copyright 2014 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.
 
 
 """Recipe for the Skia RecreateSKPs Bot."""
 
 
 DEPS = [
   'build/file',
   'core',
   'depot_tools/gclient',
+  'infra',
   'recipe_engine/path',
   'recipe_engine/properties',
   'recipe_engine/python',
   'recipe_engine/raw_io',
   'recipe_engine/step',
   'vars',
 ]
 
 
 TEST_BUILDERS = {
@@ skipping 106 matching lines @@
          '--target_dir', output_dir]
   if 'Canary' not in api.properties['buildername']:
     cmd.append('--upload_to_partner_bucket')
   api.step('Recreate SKPs',
            cmd=cmd,
            cwd=api.vars.skia_dir,
            env=env)
 
   # Upload the SKPs.
   if 'Canary' not in api.properties['buildername']:
+    api.infra.update_go_deps()
     cmd = ['python',
            api.vars.skia_dir.join('infra', 'bots', 'upload_skps.py'),
            '--target_dir', output_dir]
+    env.update(api.infra.go_env)
     with depot_tools_auth(api, UPDATE_SKPS_KEY):
       api.step('Upload SKPs',
                cmd=cmd,
                cwd=api.vars.skia_dir,
                env=env)
 
 
 def GenTests(api):
   for mastername, slaves in TEST_BUILDERS.iteritems():
     for slavename, builders_by_slave in slaves.iteritems():
       for builder in builders_by_slave:
         test = (
             api.test(builder) +
             api.properties(buildername=builder,
                            mastername=mastername,
                            slavename=slavename,
                            revision='abc123',
                            buildnumber=2,
                            path_config='kitchen',
                            swarm_out_dir='[SWARM_OUT_DIR]') +
             api.path.exists(api.path['slave_build'].join('skp_output'))
         )
         yield test