Clean up JSON Schema Compiler.

tools/json_schema_compiler/cpp_util.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.
 
 """Utilies and constants specific to Chromium C++ code.
 """
 
 from code import Code
 from datetime import datetime
-from model import Property, PropertyType, Type
+from model import PropertyType
 import os
 import re
 
 CHROMIUM_LICENSE = (
 """// Copyright (c) %d 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.""" % datetime.now().year
 )
 GENERATED_FILE_MESSAGE = """// GENERATED FROM THE API DEFINITION IN
 //   %s
@@ skipping 83 matching lines @@
     c.Append('namespace %s {' % component)
   return c
 
 def CloseNamespace(namespace):
   """Get closing root namespace declarations.
   """
   c = Code()
   for component in reversed(namespace.split('::')):
     c.Append('}  // namespace %s' % component)
   return c