[bindings] Let NativeValueTraits<T>::nativeValue be variadic function and merge various convers…

Source/core/inspector/InjectedScriptBase.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 148 matching lines @@
     if (isEmpty() || !canAccessInspectedWindow()) {
         *result = JSONValue::null();
         return;
     }
 
     bool hadException = false;
     ScriptValue resultValue = callFunctionWithEvalEnabled(function, hadException);
 
     ASSERT(!hadException);
     if (!hadException) {
-        *result = resultValue.toJSONValue(m_injectedScriptObject.scriptState());
+        ScriptState* scriptState = m_injectedScriptObject.scriptState();
+        ScriptState::Scope scope(scriptState);
+        NonThrowableExceptionState exceptionState;
+        *result = ScriptValue::to<JSONValuePtr>(scriptState->isolate(), resultValue, exceptionState);
         if (!*result)
             *result = JSONString::create(String::format("Object has too long reference chain(must not be longer than %d)", JSONValue::maxDepth));
     } else {
         *result = JSONString::create("Exception while making a call.");
     }
 }
 
 void InjectedScriptBase::makeEvalCall(ErrorString* errorString, ScriptFunctionCall& function, RefPtr<TypeBuilder::Runtime::RemoteObject>* objectResult, TypeBuilder::OptOutput<bool>* wasThrown, RefPtr<TypeBuilder::Debugger::ExceptionDetails>* exceptionDetails)
 {
     RefPtr<JSONValue> result;
@@ skipping 21 matching lines @@
     if (wasThrownVal) {
         RefPtr<JSONObject> objectExceptionDetails = resultPair->getObject("exceptionDetails");
         if (objectExceptionDetails)
             *exceptionDetails = toExceptionDetails(objectExceptionDetails.release());
     }
     *objectResult = TypeBuilder::Runtime::RemoteObject::runtimeCast(resultObj);
     *wasThrown = wasThrownVal;
 }
 
 } // namespace blink