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

base/json/json_value_serializer.h

Index: base/json/json_value_serializer.h
diff --git a/base/json/json_value_serializer.h b/base/json/json_value_serializer.h
index 82fd9639c1a2c586a1961bfc7c140af07ea32b72..07d985d812fa307da9f734172ac96b2c05739e22 100644
--- a/base/json/json_value_serializer.h
+++ b/base/json/json_value_serializer.h
@@ -41,6 +41,10 @@ class BASE_EXPORT JSONStringValueSerializer : public base::ValueSerializer {
   // 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
@@ -59,6 +63,8 @@ class BASE_EXPORT JSONStringValueSerializer : public base::ValueSerializer {
   }
 
  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.
@@ -89,6 +95,10 @@ class BASE_EXPORT JSONFileValueSerializer : public base::ValueSerializer {
   // 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
@@ -119,6 +129,8 @@ class BASE_EXPORT JSONFileValueSerializer : public base::ValueSerializer {
   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