Remove the 'gyp_config' concept from MB.

tools/mb/mb_unittest.py

 #!/usr/bin/python
 # 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.
 
 """Tests for mb.py."""
 
 import json
 import StringIO
 import sys
@@ skipping 103 matching lines @@
       'gyp_defaults': 'doom_melon=0',
     },
     'gyp': {'type': 'gyp'},
     'gn': {'type': 'gn'},
     'goma': {
       'gn_args': 'use_goma=true goma_dir="$(goma_dir)"',
       'gyp_defines': 'goma=1 gomadir="$(goma_dir)"',
     },
     'rel': {
       'gn_args': 'is_debug=false',
-      'gyp_config': 'Release',
     },
     'debug': {
       'gn_args': 'is_debug=true',
-      'gyp_config': 'Debug',
     },
   },
   'private_configs': ['private'],
   'unsupported_configs': ['unsupported'],
 }
 """
 
 
 class UnitTest(unittest.TestCase):
   def fake_mbw(self, files=None):
@@ skipping 158 matching lines @@
     self.check(['gen', '-c', 'gyp_rel_bot', '//out/Release'], ret=0)
 
   def test_gyp_gen_fails(self):
     mbw = self.fake_mbw()
     mbw.Call = lambda cmd, env=None: (1, '', '')
     self.check(['gen', '-c', 'gyp_rel_bot', '//out/Release'], mbw=mbw, ret=1)
 
   def test_gyp_lookup_goma_dir_expansion(self):
     self.check(['lookup', '-c', 'gyp_rel_bot', '-g', '/foo'], ret=0,
                out=("python build/gyp_chromium -G 'output_dir=<path>' "
-                    "-G config=Release -D goma=1 -D gomadir=/foo\n"))
+                    "-D goma=1 -D gomadir=/foo\n"))
 
   def test_help(self):
     orig_stdout = sys.stdout
     try:
       sys.stdout = StringIO.StringIO()
       self.assertRaises(SystemExit, self.check, ['-h'])
       self.assertRaises(SystemExit, self.check, ['help'])
       self.assertRaises(SystemExit, self.check, ['help', 'gen'])
     finally:
       sys.stdout = orig_stdout
 
 
   def test_validate(self):
     self.check(['validate'], ret=0)
 
 
 if __name__ == '__main__':
   unittest.main()