Devtools: initialize protocol enums synchronously

Source/devtools/scripts/generate_protocol_externs.py

 #!/usr/bin/env python
 # Copyright (c) 2011 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
@@ skipping 142 matching lines @@
                 if (promisified):
                     output_file.write(" * @return {!Promise.<T>}\n")
                     output_file.write(" * @template T\n")
                 params.append("opt_callback")
 
                 output_file.write(" */\n")
                 output_file.write("Protocol.%sAgent.prototype.%s = function(%s) {}\n" % (domain_name, command["name"], ", ".join(params)))
                 output_file.write("/** @param {function(%s):void=} opt_callback */\n" % ", ".join(returns))
                 output_file.write("Protocol.%sAgent.prototype.invoke_%s = function(obj, opt_callback) {}\n" % (domain_name, command["name"]))
 
-        output_file.write("\n\n\nvar %sAgent = {};\n" % domain_name)
+        output_file.write("\n\n\nvar %sAgent = function(){};\n" % domain_name)
 
         if "types" in domain:
             for type in domain["types"]:
                 if type["type"] == "object":
                     typedef_args = []
                     if "properties" in type:
                         for property in type["properties"]:
                             suffix = ""
                             if ("optional" in property):
                                 suffix = "|undefined"
@@ skipping 53 matching lines @@
 if __name__ == "__main__":
     import sys
     import os.path
     program_name = os.path.basename(__file__)
     if len(sys.argv) < 4 or sys.argv[1] != "-o":
         sys.stderr.write("Usage: %s -o OUTPUT_FILE INPUT_FILE\n" % program_name)
         exit(1)
     output_path = sys.argv[2]
     input_path = sys.argv[3]
     generate_protocol_externs(output_path, input_path)