json_schema_compiler: Use std::vector<char> for binary values.

tools/json_schema_compiler/cpp_type_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 code import Code
 from model import PropertyType
 import cpp_util
 from json_parse import OrderedDict
 import schema_util
 
@@ skipping 94 matching lines @@
       cpp_type = 'base::Value'
     elif type_.property_type == PropertyType.FUNCTION:
       # Functions come into the json schema compiler as empty objects. We can
       # record these as empty DictionaryValues so that we know if the function
       # was passed in or not.
       cpp_type = 'base::DictionaryValue'
     elif type_.property_type == PropertyType.ARRAY:
       item_cpp_type = self.GetCppType(type_.item_type, is_in_container=True)
       cpp_type = 'std::vector<%s>' % cpp_util.PadForGenerics(item_cpp_type)
     elif type_.property_type == PropertyType.BINARY:
-      cpp_type = 'std::string'
+      cpp_type = 'std::vector<char>'
     else:
       raise NotImplementedError('Cannot get type of %s' % type_.property_type)
 
     # HACK: optional ENUM is represented elsewhere with a _NONE value, so it
     # never needs to be wrapped in pointer shenanigans.
     # TODO(kalman): change this - but it's an exceedingly far-reaching change.
     if not self.FollowRef(type_).property_type == PropertyType.ENUM:
       if is_in_container and (is_ptr or not self.IsCopyable(type_)):
         cpp_type = 'linked_ptr<%s>' % cpp_util.PadForGenerics(cpp_type)
       elif is_ptr:
@@ skipping 138 matching lines @@
         child_code = self.GeneratePropertyValues(child_property,
                                                  line,
                                                  nodoc=nodoc)
         if child_code:
           has_child_code = True
           c.Concat(child_code)
       c.Eblock('}  // namespace %s' % prop.name)
       if not has_child_code:
         c = None
     return c