Reland of iOS: Use JSON for GN configuration instead of MB + remove symbols

tools-webrtc/mb/mb_unittest.py

 #!/usr/bin/python
 # Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 """Tests for mb.py."""
 
 import ast
 import json
 import StringIO
 import os
 import sys
 import unittest
 
 import mb
 
 
 class FakeMBW(mb.MetaBuildWrapper):
   def __init__(self, win32=False):
     super(FakeMBW, self).__init__()
 
     # Override vars for test portability.
     if win32:
-      self.chromium_src_dir = 'c:\\fake_src'
+      self.src_dir = 'c:\\fake_src'
       self.default_config = 'c:\\fake_src\\tools-webrtc\\mb\\mb_config.pyl'
       self.default_isolate_map = ('c:\\fake_src\\testing\\buildbot\\'
                                   'gn_isolate_map.pyl')
       self.platform = 'win32'
       self.executable = 'c:\\python\\python.exe'
       self.sep = '\\'
     else:
-      self.chromium_src_dir = '/fake_src'
+      self.src_dir = '/fake_src'
       self.default_config = '/fake_src/tools-webrtc/mb/mb_config.pyl'
       self.default_isolate_map = '/fake_src/testing/buildbot/gn_isolate_map.pyl'
       self.executable = '/usr/bin/python'
       self.platform = 'linux2'
       self.sep = '/'
 
     self.files = {}
     self.calls = []
     self.cmds = []
     self.cross_compile = None
@@ skipping 731 matching lines @@
     self.check(['lookup', '-c', 'fake_config'], mbw=mbw,
                ret=0,
                out=("GYP_DEFINES='foo=bar baz=1'\n"
                     "GYP_LINK_CONCURRENCY=1\n"
                     "LLVM_FORCE_HEAD_REVISION=1\n"
                     "python build/gyp_chromium -G output_dir=_path_\n"))
 
 
 if __name__ == '__main__':
   unittest.main()