Add fetch recipe alias targeting Android

recipes/chromium.py

Index: recipes/chromium.py
diff --git a/recipes/chromium.py b/recipes/chromium.py
index b9156ed926c8cbd484dd1641e7c260fc95dfc2fa..7e9be751e2bdf92dcc0f04eb10600788a29e73b7 100644
--- a/recipes/chromium.py
+++ b/recipes/chromium.py
@@ -2,10 +2,12 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import sys
 # pylint: disable=F0401
 import recipe_util
-import sys
 
+
+# This class doesn't need an __init__ method, so we disable the warning
 # pylint: disable=W0232
 class Chromium(recipe_util.Recipe):
   """Basic Recipe class for Chromium."""
@@ -30,13 +32,15 @@ class Chromium(recipe_util.Recipe):
     }
     if props.get('submodule_git_svn_spec'):
       spec['submodule_git_svn_spec'] = props['submodule_git_svn_spec']
+    if props.get('target_os'):
+      spec['target_os'] = props['target_os'].split(',')
     checkout_type = 'gclient_git_svn'
     if props.get('nosvn'):
       checkout_type = 'gclient_git'
     spec_type = '%s_spec' % checkout_type
     return {
       'type': checkout_type,
-      spec_type: spec
+      spec_type: spec,
     }
 
   @staticmethod