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

Source/bindings/core/v8/custom/V8InjectedScriptHostCustom.cpp

 /*
  * Copyright (C) 2007-2011 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 338 matching lines @@
 
     v8SetReturnValue(info, result);
 }
 
 void V8InjectedScriptHost::inspectMethodCustom(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (info.Length() < 2)
         return;
 
     InjectedScriptHost* host = V8InjectedScriptHost::toImpl(info.Holder());
-    ScriptState* scriptState = ScriptState::current(info.GetIsolate());
+    v8::Isolate* isolate = info.GetIsolate();
+    ScriptState* scriptState = ScriptState::current(isolate);
     ScriptValue object(scriptState, info[0]);
     ScriptValue hints(scriptState, info[1]);
-    host->inspectImpl(object.toJSONValue(scriptState), hints.toJSONValue(scriptState));
+    ScriptState::Scope scope(scriptState);
+    NonThrowableExceptionState exceptionState;
+    RefPtr<JSONValue> jsonObject = ScriptValue::to<JSONValuePtr>(isolate, object, exceptionState);
+    RefPtr<JSONValue> jsonHints = ScriptValue::to<JSONValuePtr>(isolate, hints, exceptionState);
+    host->inspectImpl(jsonObject, jsonHints);
 }
 
 void V8InjectedScriptHost::evalMethodCustom(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     v8::Isolate* isolate = info.GetIsolate();
     if (info.Length() < 1) {
         isolate->ThrowException(v8::Exception::Error(v8::String::NewFromUtf8(isolate, "One argument expected.")));
         return;
     }
 
@@ skipping 212 matching lines @@
     InjectedScriptNative* injectedScriptNative = InjectedScriptNative::fromInjectedScriptHost(info.Holder());
     if (!injectedScriptNative)
         return;
     int id = info[0]->ToInt32(info.GetIsolate())->Value();
     String groupName = injectedScriptNative->groupName(id);
     if (!groupName.isEmpty())
         info.GetReturnValue().Set(v8String(info.GetIsolate(), groupName));
 }
 
 } // namespace blink