Allow JSONWriter and JSONValueSerializer to omit binary values when instructed to do so.

base/json/json_value_serializer.h

 // Copyright (c) 2011 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 BASE_JSON_JSON_VALUE_SERIALIZER_H_
 #define BASE_JSON_JSON_VALUE_SERIALIZER_H_
 #pragma once
 
 #include <string>
 
@@ skipping 23 matching lines @@
         allow_trailing_comma_(false) {
   }
 
   virtual ~JSONStringValueSerializer();
 
   // Attempt to serialize the data structure represented by Value into
   // JSON.  If the return value is true, the result will have been written
   // into the string passed into the constructor.
   virtual bool Serialize(const Value& root) OVERRIDE;
 
+  // Equivalent to Serialize(root) except binary values are omitted from the
+  // output.
+  bool SerializeAndOmitBinaryValues(const Value& root);
+
   // Attempt to deserialize the data structure encoded in the string passed
   // in to the constructor into a structure of Value objects.  If the return
   // value is NULL, and if |error_code| is non-null, |error_code| will
   // contain an integer error code (either JsonFileError or JsonParseError).
   // If |error_message| is non-null, it will be filled in with a formatted
   // error message including the location of the error if appropriate.
   // The caller takes ownership of the returned value.
   virtual Value* Deserialize(int* error_code,
                              std::string* error_message) OVERRIDE;
 
   void set_pretty_print(bool new_value) { pretty_print_ = new_value; }
   bool pretty_print() { return pretty_print_; }
 
   void set_allow_trailing_comma(bool new_value) {
     allow_trailing_comma_ = new_value;
   }
 
  private:
+  bool SerializeInternal(const Value& root, bool omit_binary_values);
+
   std::string* json_string_;
   bool initialized_with_const_string_;
   bool pretty_print_;  // If true, serialization will span multiple lines.
   // If true, deserialization will allow trailing commas.
   bool allow_trailing_comma_;
 
   DISALLOW_COPY_AND_ASSIGN(JSONStringValueSerializer);
 };
 
 class BASE_EXPORT JSONFileValueSerializer : public base::ValueSerializer {
@@ skipping 10 matching lines @@
   // DO NOT USE except in unit tests to verify the file was written properly.
   // We should never serialize directly to a file since this will block the
   // thread. Instead, serialize to a string and write to the file you want on
   // the file thread.
   //
   // Attempt to serialize the data structure represented by Value into
   // JSON.  If the return value is true, the result will have been written
   // into the file whose name was passed into the constructor.
   virtual bool Serialize(const Value& root) OVERRIDE;
 
+  // Equivalent to Serialize(root) except binary values are omitted from the
+  // output.
+  bool SerializeAndOmitBinaryValues(const Value& root);
+
   // Attempt to deserialize the data structure encoded in the file passed
   // in to the constructor into a structure of Value objects.  If the return
   // value is NULL, and if |error_code| is non-null, |error_code| will
   // contain an integer error code (either JsonFileError or JsonParseError).
   // If |error_message| is non-null, it will be filled in with a formatted
   // error message including the location of the error if appropriate.
   // The caller takes ownership of the returned value.
   virtual Value* Deserialize(int* error_code,
                              std::string* error_message) OVERRIDE;
 
@@ skipping 10 matching lines @@
   static const char* kAccessDenied;
   static const char* kCannotReadFile;
   static const char* kFileLocked;
   static const char* kNoSuchFile;
 
   // Convert an error code into an error message.  |error_code| is assumed to
   // be a JsonFileError.
   static const char* GetErrorMessageForCode(int error_code);
 
  private:
+  bool SerializeInternal(const Value& root, bool omit_binary_values);
+
   FilePath json_file_path_;
 
   // A wrapper for file_util::ReadFileToString which returns a non-zero
   // JsonFileError if there were file errors.
   int ReadFileToString(std::string* json_string);
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(JSONFileValueSerializer);
 };
 
 #endif  // BASE_JSON_JSON_VALUE_SERIALIZER_H_