Cleanup env variable names

fpdfsdk/javascript/PublicMethods.cpp

Index: fpdfsdk/javascript/PublicMethods.cpp
diff --git a/fpdfsdk/javascript/PublicMethods.cpp b/fpdfsdk/javascript/PublicMethods.cpp
index 25bbca65f7f4b3b4f72f32d205dce2bac487938a..2310200084accbe6070608f09c880f8bed319693 100644
--- a/fpdfsdk/javascript/PublicMethods.cpp
+++ b/fpdfsdk/javascript/PublicMethods.cpp
@@ -79,9 +79,9 @@ CFX_WideString StrTrim(const CFX_WideString& pStr) {
 }
 
 void AlertIfPossible(CJS_Context* pContext, const FX_WCHAR* swMsg) {
-  CPDFSDK_FormFillEnvironment* pEnv = pContext->GetFormFillEnv();
-  if (pEnv)
-    pEnv->JS_appAlert(swMsg, nullptr, 0, 3);
+  CPDFSDK_FormFillEnvironment* pFormFillEnv = pContext->GetFormFillEnv();
+  if (pFormFillEnv)
+    pFormFillEnv->JS_appAlert(swMsg, nullptr, 0, 3);
 }
 
 }  // namespace
@@ -1659,7 +1659,7 @@ FX_BOOL CJS_PublicMethods::AFSimple_Calculate(
   CJS_Context* pContext = static_cast<CJS_Context*>(cc);
   CJS_Runtime* pRuntime = CJS_Runtime::FromContext(cc);
   CPDFSDK_InterForm* pReaderInterForm =
-      pContext->GetFormFillEnv()->GetSDKDocument()->GetInterForm();
+      pContext->GetFormFillEnv()->GetInterForm();
   CPDF_InterForm* pInterForm = pReaderInterForm->GetInterForm();
 
   CFX_WideString sFunction = params[0].ToCFXWideString(pRuntime);