Implement IJS_Runtime::Destroy().

fpdfsdk/javascript/cjs_runtime.cpp

Index: fpdfsdk/javascript/cjs_runtime.cpp
diff --git a/fpdfsdk/javascript/cjs_runtime.cpp b/fpdfsdk/javascript/cjs_runtime.cpp
index 2bcdc2293b857fb7f7717546c7393182dc0137be..88530f733251f93063d04386e20930c1a154f9a6 100644
--- a/fpdfsdk/javascript/cjs_runtime.cpp
+++ b/fpdfsdk/javascript/cjs_runtime.cpp
@@ -40,6 +40,11 @@ void IJS_Runtime::Initialize(unsigned int slot, void* isolate) {
 }
 
 // static
+void IJS_Runtime::Destroy() {
+  FXJS_Release();
+}
+
+// static
 IJS_Runtime* IJS_Runtime::Create(CPDFDoc_Environment* pEnv) {
   return new CJS_Runtime(pEnv);
 }