Rename some CJS / IJS names for clarity.

Prior cleanup before making FXJS/FXJSE share one v8 context.
Return CJS object rather than isolate in one place.
Use unique_ptr in one place.

Change-Id: I837ae4880368a6d72e59b38f37e06908e05c34bd
Reviewed-on: https://pdfium-review.googlesource.com/24950
Commit-Queue: dsinclair <dsinclair@chromium.org>
Reviewed-by: dsinclair <dsinclair@chromium.org>
diff --git a/fpdfsdk/cpdfsdk_interform.cpp b/fpdfsdk/cpdfsdk_interform.cpp
index 3b76dca..2d25894 100644
--- a/fpdfsdk/cpdfsdk_interform.cpp
+++ b/fpdfsdk/cpdfsdk_interform.cpp
@@ -247,7 +247,7 @@
 #endif  // PDF_ENABLE_XFA
 
 void CPDFSDK_InterForm::OnCalculate(CPDF_FormField* pFormField) {
-  if (!m_pFormFillEnv->IsJSInitiated())
+  if (!m_pFormFillEnv->IsJSPlatformPresent())
     return;
 
   if (m_bBusy)
@@ -260,7 +260,7 @@
     return;
   }
 
-  IJS_Runtime* pRuntime = m_pFormFillEnv->GetJSRuntime();
+  IJS_Runtime* pRuntime = m_pFormFillEnv->GetIJSRuntime();
   int nSize = m_pInterForm->CountFieldsInCalculationOrder();
   for (int i = 0; i < nSize; i++) {
     CPDF_FormField* pField = m_pInterForm->GetFieldInCalculationOrder(i);
@@ -301,12 +301,12 @@
 WideString CPDFSDK_InterForm::OnFormat(CPDF_FormField* pFormField,
                                        bool& bFormatted) {
   WideString sValue = pFormField->GetValue();
-  if (!m_pFormFillEnv->IsJSInitiated()) {
+  if (!m_pFormFillEnv->IsJSPlatformPresent()) {
     bFormatted = false;
     return sValue;
   }
 
-  IJS_Runtime* pRuntime = m_pFormFillEnv->GetJSRuntime();
+  IJS_Runtime* pRuntime = m_pFormFillEnv->GetIJSRuntime();
   if (pFormField->GetFieldType() == FormFieldType::kComboBox &&
       pFormField->CountSelectedItems() > 0) {
     int index = pFormField->GetSelectedIndex(0);