[inspector_protocol] Introduce protocol::Serializable

lib/Values_cpp.template

 // Copyright 2016 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.
 
 //#include "Values.h"
 
 {% for namespace in config.protocol.namespace %}
 namespace {{namespace}} {
 {% endfor %}
 
@@ skipping 75 matching lines @@
 bool Value::asString(String*) const
 {
     return false;
 }
 
 bool Value::asSerialized(String*) const
 {
     return false;
 }
 
-String Value::toJSONString() const
-{
-    StringBuilder result;
-    StringUtil::builderReserve(result, 512);
-    writeJSON(&result);
-    return result.toString();
-}
-
 void Value::writeJSON(StringBuilder* output) const
 {
     DCHECK(m_type == TypeNull);
     output->append(nullValueString, 4);
 }
 
 std::unique_ptr<Value> Value::clone() const
 {
     return Value::null();
 }
 
+String Value::serialize()
+{
+    StringBuilder result;
+    StringUtil::builderReserve(result, 512);
+    writeJSON(&result);
+    return result.toString();
+}
+
 bool FundamentalValue::asBoolean(bool* output) const
 {
     if (type() != TypeBoolean)
         return false;
     *output = m_boolValue;
     return true;
 }
 
 bool FundamentalValue::asDouble(double* output) const
 {
@@ skipping 273 matching lines @@
 
 protocol::Value* ListValue::at(size_t index)
 {
     DCHECK_LT(index, m_data.size());
     return m_data[index].get();
 }
 
 {% for namespace in config.protocol.namespace %}
 } // namespace {{namespace}}
 {% endfor %}