[inspector_protocol] Allow overriding specific config values.

CodeGenerator.py

 # Copyright 2016 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 os.path
 import sys
 import optparse
 import collections
 import functools
 try:
@@ skipping 34 matching lines @@
             if optional_key.find(".") == -1 and optional_key not in keys:
                 keys.append(optional_key)
                 values.append(defaults[optional])
         return collections.namedtuple('X', keys)(*values)
 
     try:
         cmdline_parser = optparse.OptionParser()
         cmdline_parser.add_option("--output_base")
         cmdline_parser.add_option("--jinja_dir")
         cmdline_parser.add_option("--config")
+        cmdline_parser.add_option("--config_value", action="append", type="string")
         arg_options, _ = cmdline_parser.parse_args()
         jinja_dir = arg_options.jinja_dir
         if not jinja_dir:
             raise Exception("jinja directory must be specified")
         output_base = arg_options.output_base
         if not output_base:
             raise Exception("Base output directory must be specified")
         config_file = arg_options.config
         if not config_file:
             raise Exception("Config file name must be specified")
         config_base = os.path.dirname(config_file)
+        config_values = arg_options.config_value
     except Exception:
         # Work with python 2 and 3 http://docs.python.org/py3k/howto/pyporting.html
         exc = sys.exc_info()[1]
         sys.stderr.write("Failed to parse command-line arguments: %s\n\n" % exc)
         exit(1)
 
     try:
         config_json_file = open(config_file, "r")
         config_json_string = config_json_file.read()
         config_partial = json_to_object(config_json_string, output_base, config_base)
         config_json_file.close()
         defaults = {
             ".imported": False,
             ".imported.export_macro": "",
             ".imported.export_header": False,
             ".imported.header": False,
             ".imported.package": False,
             ".protocol.export_macro": "",
             ".protocol.export_header": False,
             ".protocol.options": False,
             ".exported": False,
             ".exported.export_macro": "",
             ".exported.export_header": False,
             ".lib": False,
             ".lib.export_macro": "",
             ".lib.export_header": False,
         }
+        for key_value in config_values:
+            parts = key_value.split("=")
+            if len(parts) == 2:
+                defaults["." + parts[0]] = parts[1]
         return (jinja_dir, config_file, init_defaults(config_partial, "", defaults))
     except Exception:
         # Work with python 2 and 3 http://docs.python.org/py3k/howto/pyporting.html
         exc = sys.exc_info()[1]
         sys.stderr.write("Failed to parse config file: %s\n\n" % exc)
         exit(1)
 
 
 def to_title_case(name):
     return name[:1].upper() + name[1:]
@@ skipping 431 matching lines @@
     if up_to_date:
         sys.exit()
 
     for file_name, content in outputs.iteritems():
         out_file = open(file_name, "w")
         out_file.write(content)
         out_file.close()
 
 
 main()