Don`t use references to JsEngine to avoid use-after-free errors,switch to shared_ptr instead

src/GlobalJsObject.cpp

 #include <vector>
 #include <stdexcept>
 
-#include <AdblockPlus/JsEngine.h>
 #include <AdblockPlus/JsValue.h>
 
 #include "AppInfoJsObject.h"
 #include "ConsoleJsObject.h"
 #include "FileSystemJsObject.h"
 #include "GlobalJsObject.h"
 #include "ConsoleJsObject.h"
 #include "WebRequestJsObject.h"
 #include "Thread.h"
 
@@ skipping 32 matching lines @@
     JsValueList functionArguments;
   };
 
   v8::Handle<v8::Value> SetTimeoutCallback(const v8::Arguments& arguments)
   {
     TimeoutThread* timeoutThread;
     try
     {
       AdblockPlus::JsValueList converted =
           AdblockPlus::JsEngine::FromArguments(arguments)
-          .ConvertArguments(arguments);
+          ->ConvertArguments(arguments);
       timeoutThread = new TimeoutThread(converted);
     }
     catch (const std::exception& e)
     {
       return v8::ThrowException(v8::String::New(e.what()));
     }
     timeoutThread->Start();
 
     // We should actually return the timer ID here, which could be
     // used via clearTimeout(). But since we don't seem to need
     // clearTimeout(), we can save that for later.
     return v8::Undefined();
   }
 }
 
-JsValuePtr GlobalJsObject::Setup(JsEngine& jsEngine, const AppInfo& appInfo,
+JsValuePtr GlobalJsObject::Setup(JsEnginePtr jsEngine, const AppInfo& appInfo,
     JsValuePtr obj)
 {
-  obj->SetProperty("setTimeout", jsEngine.NewCallback(::SetTimeoutCallback));
+  obj->SetProperty("setTimeout", jsEngine->NewCallback(::SetTimeoutCallback));
   obj->SetProperty("_fileSystem",
-      FileSystemJsObject::Setup(jsEngine, jsEngine.NewObject()));
+      FileSystemJsObject::Setup(jsEngine, jsEngine->NewObject()));
   obj->SetProperty("_webRequest",
-      WebRequestJsObject::Setup(jsEngine, jsEngine.NewObject()));
+      WebRequestJsObject::Setup(jsEngine, jsEngine->NewObject()));
   obj->SetProperty("console",
-      ConsoleJsObject::Setup(jsEngine, jsEngine.NewObject()));
+      ConsoleJsObject::Setup(jsEngine, jsEngine->NewObject()));
   obj->SetProperty("_appInfo",
-      AppInfoJsObject::Setup(jsEngine, appInfo, jsEngine.NewObject()));
+      AppInfoJsObject::Setup(jsEngine, appInfo, jsEngine->NewObject()));
   return obj;
 }