Fix leaks related to the usage of JSE runtime data

fxjs/cfxjse_runtimedata.cpp

Index: fxjs/cfxjse_runtimedata.cpp
diff --git a/fxjs/cfxjse_runtimedata.cpp b/fxjs/cfxjse_runtimedata.cpp
index 2c9379526e40c2e044b0864907142dd71f24e516..021fb1dbe4324e0a787a6ff9b043e57849b69a92 100644
--- a/fxjs/cfxjse_runtimedata.cpp
+++ b/fxjs/cfxjse_runtimedata.cpp
@@ -20,10 +20,8 @@ class FXJSE_ArrayBufferAllocator : public v8::ArrayBuffer::Allocator {
 };
 
 void Runtime_DisposeCallback(v8::Isolate* pIsolate, bool bOwned) {
-  if (FXJS_PerIsolateData* pData = FXJS_PerIsolateData::Get(pIsolate)) {
-    delete pData->m_pFXJSERuntimeData;
-    pData->m_pFXJSERuntimeData = nullptr;
-  }
+  if (FXJS_PerIsolateData* pData = FXJS_PerIsolateData::Get(pIsolate))
+    delete pData;
   if (bOwned)
     pIsolate->Dispose();
 }
@@ -77,8 +75,10 @@ CFXJSE_RuntimeData::CFXJSE_RuntimeData(v8::Isolate* pIsolate)
 
 CFXJSE_RuntimeData::~CFXJSE_RuntimeData() {}
 
-CFXJSE_RuntimeData* CFXJSE_RuntimeData::Create(v8::Isolate* pIsolate) {
-  CFXJSE_RuntimeData* pRuntimeData = new CFXJSE_RuntimeData(pIsolate);
+std::unique_ptr<CFXJSE_RuntimeData> CFXJSE_RuntimeData::Create(
+    v8::Isolate* pIsolate) {
+  std::unique_ptr<CFXJSE_RuntimeData> pRuntimeData(
+      new CFXJSE_RuntimeData(pIsolate));
   CFXJSE_ScopeUtil_IsolateHandle scope(pIsolate);
   v8::Local<v8::FunctionTemplate> hFuncTemplate =
       v8::FunctionTemplate::New(pIsolate);
@@ -101,7 +101,7 @@ CFXJSE_RuntimeData* CFXJSE_RuntimeData::Get(v8::Isolate* pIsolate) {
   FXJS_PerIsolateData* pData = FXJS_PerIsolateData::Get(pIsolate);
   if (!pData->m_pFXJSERuntimeData)
     pData->m_pFXJSERuntimeData = CFXJSE_RuntimeData::Create(pIsolate);
-  return pData->m_pFXJSERuntimeData;
+  return pData->m_pFXJSERuntimeData.get();
 }
 
 CFXJSE_IsolateTracker* CFXJSE_IsolateTracker::g_pInstance = nullptr;