Let json schema compiler handle using arrays as types

tools/json_schema_compiler/util_cc_helper.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.
 
 API_UTIL_NAMESPACE = 'json_schema_compiler::util'
 
 class UtilCCHelper(object):
   """A util class that generates code that uses
   tools/json_schema_compiler/util.cc.
   """
@@ skipping 17 matching lines @@
     sub['type'] = self._type_manager.GetType(prop)
     if array_prop.optional:
       val = ('%(namespace)s::PopulateOptionalArrayFromDictionary'
           '(*%(src)s, "%(name)s", &%(dst)s)')
     else:
       val = ('%(namespace)s::PopulateArrayFromDictionary'
           '(*%(src)s, "%(name)s", &%(dst)s)')
 
     return val % sub
 
-  def PopulateArrayFromList(self, array_prop, src, dst):
+  def PopulateArrayFromList(self, array_prop, src, dst, optional):
     """Generates code to get an array from src into dst.
 
     src: ListValue*
     dst: std::vector or scoped_ptr<std::vector>
     """
     prop = array_prop.item_type
     sub = {
         'namespace': API_UTIL_NAMESPACE,
         'src': src,
         'dst': dst,
         'type': self._type_manager.GetType(prop),
     }
 
-    if array_prop.optional:
+    if optional:
       val = '%(namespace)s::PopulateOptionalArrayFromList(*%(src)s, &%(dst)s)'
     else:
       val = '%(namespace)s::PopulateArrayFromList(*%(src)s, &%(dst)s)'
 
     return val % sub
 
-  def CreateValueFromArray(self, array_prop, src):
+  def CreateValueFromArray(self, array_prop, src, optional):
     """Generates code to create a scoped_pt<Value> from the array at src.
 
     src: std::vector or scoped_ptr<std::vector>
     """
     prop = array_prop.item_type
     sub = {
         'namespace': API_UTIL_NAMESPACE,
         'src': src,
         'type': self._type_manager.GetType(prop),
     }
 
-    if array_prop.optional:
+    if optional:
       val = '%(namespace)s::CreateValueFromOptionalArray(%(src)s)'
     else:
       val = '%(namespace)s::CreateValueFromArray(%(src)s)'
 
     return val % sub
 
   def GetIncludePath(self):
     return '#include "tools/json_schema_compiler/util.h"'