Revert "build: roll infra_paths changes"

scripts/slave/recipe_modules/cipd/example.py

 # Copyright 2015 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.
 
 DEPS = [
-  'depot_tools/infra_paths',
   'file',
   'recipe_engine/path',
   'recipe_engine/platform',
   'recipe_engine/properties',
   'recipe_engine/step',
   'cipd',
 ]
 
 def RunSteps(api):
   # First, you need a cipd client.
   api.cipd.install_client('install cipd')
   api.cipd.install_client('install cipd', version='deadbeaf')
   assert api.cipd.get_executable()
 
   package_name = 'public/package/%s' % api.cipd.platform_suffix()
   package_instance_id = '7f751b2237df2fdf3c1405be00590fefffbaea2d'
   packages = {package_name: package_instance_id}
 
-  cipd_root = api.infra_paths['slave_build'].join('packages')
+  cipd_root = api.path['slave_build'].join('packages')
   # Some packages don't require credentials to be installed or queried.
   api.cipd.ensure(cipd_root, packages)
   step = api.cipd.search(package_name, tag='git_revision:40-chars-long-hash')
   api.cipd.describe(package_name,
                     version=step.json.output['result'][0]['instance_id'])
 
   # Others do, so provide creds first.
   api.cipd.set_service_account_credentials('fake-credentials.json')
   private_package_name = 'private/package/%s' % api.cipd.platform_suffix()
   packages[private_package_name] = 'latest'
@@ skipping 57 matching lines @@
     api.test('describe-many-instances') +
     api.platform('linux', 64) +
     api.override_step_data(
       'cipd search fake-package/linux-amd64 dead:beaf',
       api.cipd.example_search(
         'public/package/linux-amd64-ubuntu14_04',
         instances=3
       )
     )
   )