Move recipe engine to third_party/recipe_engine.

scripts/slave/recipe_modules/omahaproxy/api.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.
 
 import cStringIO
 import csv
 
-from slave import recipe_api
+from recipe_engine import recipe_api
 
 
 class OmahaproxyApi(recipe_api.RecipeApi):
   """APIs for interacting with omahaproxy."""
 
   @staticmethod
   def split_version(text):
     result = [int(x) for x in text.split('.')]
     assert len(result) == 4
     return result
@@ skipping 13 matching lines @@
     data = list(csv_reader)
     header = data[0]
     for row in data[1:]:
       candidate = {header[i]: row[i] for i in range(len(row))}
       if (min_major_version and
           self.split_version(candidate['version'])[0] < min_major_version):
         continue
       if row[0].strip() in exclude_platforms:
         continue
       yield candidate