Extract functions from path recipe module so that step can depend on it

scripts/slave/recipes/codesearch.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.
 
 DEPS = [
   'bot_update',
   'chromium',
+  'file',
   'gclient',
   'gsutil',
   'path',
   'properties',
   'python',
   'raw_io',
   'step',
 ]
 
 INDEX_PACK_NAME = 'index_pack.zip'
@@ skipping 59 matching lines @@
   # Create the index pack
   api.python('create index pack',
              api.path['build'].join('scripts', 'slave', 'chromium',
                                     'package_index.py'),
              ['--path-to-compdb', debug_path.join('compile_commands.json'),
               '--path-to-archive-output', debug_path.join(INDEX_PACK_NAME)])
 
   # Remove the llvm-build directory, so that gclient runhooks will download
   # the pre-built clang binary and not use the locally compiled binary from
   # the 'compile translation_unit clang tool' step.
-  api.path.rmtree('llvm-build',
+  api.file.rmtree('llvm-build',
                   api.path['checkout'].join('third_party', 'llvm-build'))
 
   # Upload the index pack
   api.gsutil.upload(
       name='upload index pack',
       source=debug_path.join(INDEX_PACK_NAME),
       bucket=bucket_name,
       dest='index_pack_%s.zip' % buildnumber
   )
 
@@ skipping 30 matching lines @@
     api.test('codesearch_test_fail_clang_tool') +
     api.step_data('generate compilation database',
                   stdout=api.raw_io.output('some compilation data')) +
     api.step_data('run translation_unit clang tool', retcode=2) +
     api.properties.generic(
       repo_name='src',
       repo_url='svn://svn-mirror.golo.chromium.org/chrome/trunk',
     )
   )