Initial commit of the Dart Chrome Extension APIs generators

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
 import os
 
 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
@@ skipping 66 matching lines @@
   e.g chrome/extensions/gen, file.h becomes CHROME_EXTENSIONS_GEN_FILE_H__.
   """
   return (('%s_%s_H__' % (path, filename))
           .upper().replace(os.sep, '_').replace('/', '_'))
 
 def PadForGenerics(var):
   """Appends a space to |var| if it ends with a >, so that it can be compiled
   within generic types.
   """
   return ('%s ' % var) if var.endswith('>') else var
+
+def OpenNamespace(namespace):
+  """Get opening root namespace declarations.
+  """
+  c = Code()
+  for component in namespace.split('::'):
+    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