Issue 5013 - Make parameter const ref when applicable.

src/JsEngine.cpp

Index: src/JsEngine.cpp
===================================================================
--- a/src/JsEngine.cpp
+++ b/src/JsEngine.cpp
@@ -107,17 +107,17 @@
   std::weak_ptr<JsEngine> weakJsEngine = jsEngine;
   jsEngine->timer->SetTimer(std::chrono::milliseconds(arguments[1]->IntegerValue()), [weakJsEngine, timerTaskIterator]
   {
     if (auto jsEngine = weakJsEngine.lock())
       jsEngine->CallTimerTask(timerTaskIterator);
   });
 }
 
-void JsEngine::CallTimerTask(TimerTasks::const_iterator timerTaskIterator)
+void JsEngine::CallTimerTask(const TimerTasks::const_iterator& timerTaskIterator)
 {
   const JsContext context(shared_from_this());
   JsValue callback(shared_from_this(), v8::Local<v8::Value>::New(GetIsolate(), *timerTaskIterator->arguments[0]));
   JsConstValueList callbackArgs;
   for (int i = 2; i < timerTaskIterator->arguments.size(); i++)
     callbackArgs.emplace_back(new JsValue(shared_from_this(),
     v8::Local<v8::Value>::New(GetIsolate(), *timerTaskIterator->arguments[i])));
   callback.Call(callbackArgs);
@@ -164,34 +164,34 @@
     filename);
   CheckTryCatch(tryCatch);
   v8::Local<v8::Value> result = script->Run();
   CheckTryCatch(tryCatch);
   return JsValuePtr(new JsValue(shared_from_this(), result));
 }
 
 void AdblockPlus::JsEngine::SetEventCallback(const std::string& eventName,
-    AdblockPlus::JsEngine::EventCallback callback)
+    const AdblockPlus::JsEngine::EventCallback& callback)
 {
   if (!callback)
   {
     RemoveEventCallback(eventName);
     return;
   }
   std::lock_guard<std::mutex> lock(eventCallbacksMutex);
   eventCallbacks[eventName] = callback;
 }
 
 void AdblockPlus::JsEngine::RemoveEventCallback(const std::string& eventName)
 {
   std::lock_guard<std::mutex> lock(eventCallbacksMutex);
   eventCallbacks.erase(eventName);
 }
 
-void AdblockPlus::JsEngine::TriggerEvent(const std::string& eventName, AdblockPlus::JsValueList& params)
+void AdblockPlus::JsEngine::TriggerEvent(const std::string& eventName, const AdblockPlus::JsValueList& params)
 {
   EventCallback callback;
   {
     std::lock_guard<std::mutex> lock(eventCallbacksMutex);
     auto it = eventCallbacks.find(eventName);
     if (it == eventCallbacks.end())
       return;
     callback = it->second;
@@ -226,17 +226,17 @@
 
 AdblockPlus::JsValuePtr AdblockPlus::JsEngine::NewObject()
 {
   const JsContext context(shared_from_this());
   return JsValuePtr(new JsValue(shared_from_this(), v8::Object::New()));
 }
 
 AdblockPlus::JsValuePtr AdblockPlus::JsEngine::NewCallback(
-    v8::InvocationCallback callback)
+    const v8::InvocationCallback& callback)
 {
   const JsContext context(shared_from_this());
 
   // Note: we are leaking this weak pointer, no obvious way to destroy it when
   // it's no longer used
   std::weak_ptr<JsEngine>* data =
       new std::weak_ptr<JsEngine>(shared_from_this());
   v8::Local<v8::FunctionTemplate> templ = v8::FunctionTemplate::New(callback,
@@ -265,30 +265,30 @@
   return list;
 }
 
 AdblockPlus::FileSystemPtr AdblockPlus::JsEngine::GetFileSystem() const
 {
   return fileSystem;
 }
 
-void AdblockPlus::JsEngine::SetFileSystem(AdblockPlus::FileSystemPtr val)
+void AdblockPlus::JsEngine::SetFileSystem(const AdblockPlus::FileSystemPtr& val)
 {
   if (!val)
     throw std::runtime_error("FileSystem cannot be null");
 
   fileSystem = val;
 }
 
 AdblockPlus::WebRequestPtr AdblockPlus::JsEngine::GetWebRequest() const
 {
   return webRequest;
 }
 
-void AdblockPlus::JsEngine::SetWebRequest(AdblockPlus::WebRequestPtr val)
+void AdblockPlus::JsEngine::SetWebRequest(const AdblockPlus::WebRequestPtr& val)
 {
   if (!val)
     throw std::runtime_error("WebRequest cannot be null");
 
   webRequest = val;
 }
 
 void AdblockPlus::JsEngine::SetIsConnectionAllowedCallback(const IsConnectionAllowedCallback& callback)
@@ -311,25 +311,25 @@
   return !localCopy || localCopy();
 }
 
 AdblockPlus::LogSystemPtr AdblockPlus::JsEngine::GetLogSystem() const
 {
   return logSystem;
 }
 
-void AdblockPlus::JsEngine::SetLogSystem(AdblockPlus::LogSystemPtr val)
+void AdblockPlus::JsEngine::SetLogSystem(const AdblockPlus::LogSystemPtr& val)
 {
   if (!val)
     throw std::runtime_error("LogSystem cannot be null");
 
   logSystem = val;
 }
 
 
 void AdblockPlus::JsEngine::SetGlobalProperty(const std::string& name,
-                                              AdblockPlus::JsValuePtr value)
+                                              const AdblockPlus::JsValuePtr& value)
 {
   auto global = GetGlobalObject();
   if (!global)
     throw std::runtime_error("Global object cannot be null");
   global->SetProperty(name, value);
 }