Revert of gin: Use V8 Maybe APIs

gin/test/file.cc

Index: gin/test/file.cc
diff --git a/gin/test/file.cc b/gin/test/file.cc
index 38efbb434f915381884fc9643e267598e44e0ff7..adcb3413bb68b064b81231cf3427dd644bebc3b1 100644
--- a/gin/test/file.cc
+++ b/gin/test/file.cc
@@ -59,10 +59,8 @@
     names.push_back(name.BaseName().AsUTF8Unsafe());
   }
 
-  v8::Local<v8::Value> v8_names;
-  if (!TryConvertToV8(args->isolate(), names, &v8_names))
-    return v8::Null(args->isolate());
-  return v8_names;
+  return gin::Converter<std::vector<std::string> >::ToV8(args->isolate(),
+                                                         names);
 }
 
 gin::WrapperInfo g_wrapper_info = { gin::kEmbedderNativeGin };