[DevTools] Do not instrument with InspectorInspectorAgent.

Source/core/inspector/CodeGeneratorInstrumentation.py

 #!/usr/bin/env python
 # Copyright (c) 2013 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 483 matching lines @@
 
 
 def generate(input_path, output_dir):
     fin = open(input_path, "r")
     files = load_model_from_idl(fin.read())
     fin.close()
 
     cpp_includes = []
     cpp_lines = []
     used_agents = set()
+    # FIXME(dgozman): remove this hack once InjectedScriptHost does not use InstrumentingAgents.
+    used_agents.add("Inspector")
     for f in files:
         cpp_includes.append(include_header(f.header_name))
 
         fout = open(output_dir + "/" + f.header_name + ".h", "w")
         fout.write(f.generate(cpp_lines, used_agents))
         fout.close()
 
     for agent in used_agents:
         cpp_includes.append(include_inspector_header(agent_class_name(agent)))
     cpp_includes.append(include_header("InstrumentingAgentsInl"))
@@ skipping 25 matching lines @@
     if not output_dirpath:
         raise Exception("Output directory must be specified")
 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)
     sys.stderr.write("Usage: <script> --output_dir <output_dir> InspectorInstrumentation.idl\n")
     exit(1)
 
 generate(input_path, output_dirpath)