Issue 5013 - Make parameter const ref when applicable.

src/ConsoleJsObject.cpp

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2017 eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 87 matching lines @@
       traceback << std::endl;
     }
 
     AdblockPlus::LogSystemPtr callback = jsEngine->GetLogSystem();
     (*callback)(AdblockPlus::LogSystem::LOG_LEVEL_TRACE, traceback.str(), "");
     return v8::Undefined();
   }
 }
 
 AdblockPlus::JsValuePtr AdblockPlus::ConsoleJsObject::Setup(
-    AdblockPlus::JsEnginePtr jsEngine, AdblockPlus::JsValuePtr obj)
+    const AdblockPlus::JsEnginePtr& jsEngine, const AdblockPlus::JsValuePtr& obj)
 {
   obj->SetProperty("log", jsEngine->NewCallback(::LogCallback));
   obj->SetProperty("debug", jsEngine->NewCallback(::DebugCallback));
   obj->SetProperty("info", jsEngine->NewCallback(::InfoCallback));
   obj->SetProperty("warn", jsEngine->NewCallback(::WarnCallback));
   obj->SetProperty("error", jsEngine->NewCallback(::ErrorCallback));
   obj->SetProperty("trace", jsEngine->NewCallback(::TraceCallback));
   return obj;
 }