Issue 5013 - Make parameter const ref when applicable.

src/FileSystemJsObject.cpp

Index: src/FileSystemJsObject.cpp
===================================================================
--- a/src/FileSystemJsObject.cpp
+++ b/src/FileSystemJsObject.cpp
@@ -94,19 +94,19 @@
     {
     }
 
     void Run()
     {
       std::string error;
       try
       {
-        std::shared_ptr<std::iostream> stream(new std::stringstream);
+        std::unique_ptr<std::iostream> stream(new std::stringstream);
         *stream << content;
-        fileSystem->Write(path, stream);
+        fileSystem->Write(path, *stream);
       }
       catch (std::exception& e)
       {
         error = e.what();
       }
       catch (...)
       {
         error = "Unknown error while writing to " + path;
@@ -344,18 +344,18 @@
     std::string resolved = jsEngine->GetFileSystem()->Resolve(converted[0]->AsString());
 
     return Utils::ToV8String(isolate, resolved);
   }
 
 }
 
 
-JsValuePtr FileSystemJsObject::Setup(JsEnginePtr jsEngine, JsValuePtr obj)
+JsValuePtr FileSystemJsObject::Setup(JsEngine& jsEngine, const JsValuePtr& obj)
 {
-  obj->SetProperty("read", jsEngine->NewCallback(::ReadCallback));
-  obj->SetProperty("write", jsEngine->NewCallback(::WriteCallback));
-  obj->SetProperty("move", jsEngine->NewCallback(::MoveCallback));
-  obj->SetProperty("remove", jsEngine->NewCallback(::RemoveCallback));
-  obj->SetProperty("stat", jsEngine->NewCallback(::StatCallback));
-  obj->SetProperty("resolve", jsEngine->NewCallback(::ResolveCallback));
+  obj->SetProperty("read", jsEngine.NewCallback(::ReadCallback));
+  obj->SetProperty("write", jsEngine.NewCallback(::WriteCallback));
+  obj->SetProperty("move", jsEngine.NewCallback(::MoveCallback));
+  obj->SetProperty("remove", jsEngine.NewCallback(::RemoveCallback));
+  obj->SetProperty("stat", jsEngine.NewCallback(::StatCallback));
+  obj->SetProperty("resolve", jsEngine.NewCallback(::ResolveCallback));
   return obj;
 }