Ignore unknown attributes when parsing JSON schemas.

components/json_schema/json_schema_validator.h

 // Copyright 2013 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.
 
 #ifndef COMPONENTS_JSON_SCHEMA_JSON_SCHEMA_VALIDATOR_H_
 #define COMPONENTS_JSON_SCHEMA_JSON_SCHEMA_VALIDATOR_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 86 matching lines @@
                                         const std::string& s1);
   static std::string FormatErrorMessage(const std::string& format,
                                         const std::string& s1,
                                         const std::string& s2);
 
   // Verifies if |schema| is a valid JSON v3 schema. When this validation passes
   // then |schema| is valid JSON that can be parsed into a DictionaryValue,
   // and that DictionaryValue can be used to build a JSONSchemaValidator.
   // Returns the parsed DictionaryValue when |schema| validated, otherwise
   // returns NULL. In that case, |error| contains an error description.
+  // If |ignore_unknown_attributes| is true then unrecognized entries in the
+  // schema will be ignored; otherwise, they'll cause a fatal parsing error.
   static scoped_ptr<base::DictionaryValue> IsValidSchema(
       const std::string& schema,
+      bool ignore_unknown_attributes,

[not at google - send to devlin, 2013/12/06 18:12:26]

pls make this an enum like the JSONWriter has (Options etc)

and consider providing two versions of this method, one with the options
argument and one without; that will clean up a lot of call sites.

[Joao da Silva, 2013/12/08 08:41:20]

Done.

       std::string* error);
 
   // Creates a validator for the specified schema.
   //
   // NOTE: This constructor assumes that |schema| is well formed and valid.
   // Errors will result in CHECK at runtime; this constructor should not be used
   // with untrusted schemas.
   explicit JSONSchemaValidator(base::DictionaryValue* schema);
 
   // Creates a validator for the specified schema and user-defined types. Each
@@ skipping 107 matching lines @@
   bool default_allow_additional_properties_;
 
   // Errors accumulated since the last call to Validate().
   std::vector<Error> errors_;
 
 
   DISALLOW_COPY_AND_ASSIGN(JSONSchemaValidator);
 };
 
 #endif  // COMPONENTS_JSON_SCHEMA_JSON_SCHEMA_VALIDATOR_H_