Extract ExtensionFunctionRegistry from ExtensionFunctionDispatcher.

tools/json_schema_compiler/h_generator.py

 # Copyright (c) 2012 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.
 
 from model import PropertyType
 import code
 import cpp_util
 import model
 import os
 
 class HGenerator(object):
   """A .h generator for a namespace.
   """
   def __init__(self, namespace, cpp_type_generator):
     self._cpp_type_generator = cpp_type_generator
     self._namespace = namespace
     self._target_namespace = (
         self._cpp_type_generator.GetCppNamespaceName(self._namespace))
 
   def Generate(self):
     """Generates a code.Code object with the .h for a single namespace.
     """
     c = code.Code()
     (c.Append(cpp_util.CHROMIUM_LICENSE)
       .Append()
       .Append(cpp_util.GENERATED_FILE_MESSAGE % self._namespace.source_file)
       .Append()
     )
 
-    ifndef_name = self._GenerateIfndefName()
+    ifndef_name = cpp_util.GenerateIfndefName(self._namespace.source_file_dir,
+                                              self._target_namespace)
     (c.Append('#ifndef %s' % ifndef_name)
       .Append('#define %s' % ifndef_name)
       .Append('#pragma once')
       .Append()
       .Append('#include <string>')
       .Append('#include <vector>')
       .Append()
       .Append('#include "base/basictypes.h"')
       .Append('#include "base/memory/linked_ptr.h"')
       .Append('#include "base/memory/scoped_ptr.h"')
@@ skipping 215 matching lines @@
           c.Comment(param.description)
         if param.type_ == PropertyType.ANY:
           c.Comment("Value* Result::Create(Value*) not generated "
                     "because it's redundant.")
           continue
         c.Append('Value* Create(const %s);' % cpp_util.GetParameterDeclaration(
             param, self._cpp_type_generator.GetType(param)))
     c.Eblock('};')
 
     return c
-
-  def _GenerateIfndefName(self):
-    """Formats a path and filename as a #define name.
-
-    e.g chrome/extensions/gen, file.h becomes CHROME_EXTENSIONS_GEN_FILE_H__.
-    """
-    return (('%s_%s_H__' %
-        (self._namespace.source_file_dir, self._target_namespace))
-        .upper().replace(os.sep, '_'))
-