Make sure the `target` parameter has been propagated in GclientFactory.

scripts/master/factory/commands.py

 # Copyright (c) 2012 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.
 
 """Set of utilities to add commands to a buildbot factory (BuildFactory).
 
 All the utility functions to add steps to a build factory here are not
 project-specific. See the other *_commands.py for project-specific commands.
 """
 
@@ skipping 1055 matching lines @@
                                        'tools', 'mb', 'mb_config.pyl')
 
     cmd = [self._python, self._mb_tool, 'gen',
            '-m', WithProperties('%(mastername)s'),
            '-b', WithProperties('%(buildername)s'),
            '--config-file', config_file_path]
 
     if '--compiler=goma' in options or '--compiler=goma-clang' in options:
       cmd += ['--goma-dir', self.PathJoin('..', '..', '..', '..', 'goma')]
 
-    # TODO(crbug.com/572694) - I'm not sure why target isn't getting honored
-    # here on the chromium.memory.full builders, but the only non-recipe
-    # builders left on this waterfall are Release, so this is a safe default.
-    # target does get passed correctly on the official builders (which are
-    # the other ones still not on recipes). It's probably not worth tracking
-    # down what's going on otherwise (better to switch to recipes).
-    target = target or 'Release'
-
+    assert(target is not None)
     cmd += ['//out/%s' % target]
 
     self._factory.addStep(
         shell.ShellCommand,
         haltOnFailure=True,
         name='generate_build_files',
         description='generate build files',
         env=env,
         locks=[self.slave_exclusive_lock],
         timeout=timeout,
@@ skipping 280 matching lines @@
 
   def commandComplete(self, cmd):
     out = cmd.logs['stdio'].getText()
     build_properties = re.findall('BUILD_PROPERTY ([^=]*)=(.*)', out)
     for propname, value in build_properties:
       # findall can return strings containing CR characters, remove with strip.
       self.build.setProperty(propname, value.strip(), 'Step')
 
   def getText(self, cmd, results):
     return self.describe(True) + self.messages