Revert "build: roll infra_paths changes"

scripts/slave/recipes/flutter/engine.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.
 
 import contextlib
 
 DEPS = [
   'depot_tools/bot_update',
   'depot_tools/gclient',
-  'depot_tools/infra_paths',
   'file',
   'gsutil',
   'recipe_engine/path',
   'recipe_engine/platform',
   'recipe_engine/properties',
   'recipe_engine/step',
   'zip',
 ]
 
 BUCKET_NAME = 'flutter_infra'
@@ skipping 205 matching lines @@
   api.gclient.c.got_revision_mapping['src'] = 'got_engine_revision'
   # TODO(eseidel): According to iannucci force=True is required.
   # See https://codereview.chromium.org/1690713003#msg6
   api.bot_update.ensure_checkout(force=True)
   api.gclient.runhooks()
 
 
 def RunSteps(api):
   # buildbot sets 'clobber' to the empty string which is falsey, check with 'in'
   if 'clobber' in api.properties:
-    api.file.rmcontents('everything', api.infra_paths['slave_build'])
+    api.file.rmcontents('everything', api.path['slave_build'])
 
   GetCheckout(api)
 
   checkout = api.path['checkout']
   dart_bin = checkout.join('third_party', 'dart-sdk', 'dart-sdk', 'bin')
   env = { 'PATH': api.path.pathsep.join((str(dart_bin), '%(PATH)s')) }
 
   # The context adds dart to the path, only needed for the analyze step for now.
   with api.step.context({'env': env}):
     AnalyzeDartUI(api)
@@ skipping 11 matching lines @@
       GenerateXcodeProject(api)
 
 
 def GenTests(api):
   # A valid commit to flutter/engine, to make the gsutil urls look real.
   for platform in ('mac', 'linux'):
     yield (api.test(platform) + api.platform(platform, 64)
         + api.properties(mastername='client.flutter',
               buildername='%s Engine' % platform.capitalize(),
               slavename='fake-m1', clobber=''))