Rename InterForm classes to InteractiveForm.

Shorten some names to try to avoid
CPDF_InteractiveForm* pInteractiveForm = GetInteractiveForm();

Change-Id: I77fafd6c4cce20aa46908830afde12f87784680e
Reviewed-on: https://pdfium-review.googlesource.com/c/43815
Commit-Queue: Lei Zhang <thestig@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
diff --git a/fpdfsdk/cpdfsdk_formfillenvironment.cpp b/fpdfsdk/cpdfsdk_formfillenvironment.cpp
index 8f490ca..568d89e 100644
--- a/fpdfsdk/cpdfsdk_formfillenvironment.cpp
+++ b/fpdfsdk/cpdfsdk_formfillenvironment.cpp
@@ -45,8 +45,8 @@
   m_bBeingDestroyed = true;
   ClearAllFocusedAnnots();
 
-  // |m_PageMap| will try to access |m_pInterForm| when it cleans itself up.
-  // Make sure it is deleted before |m_pInterForm|.
+  // |m_PageMap| will try to access |m_pInteractiveForm| when it cleans itself
+  // up. Make sure it is deleted before |m_pInteractiveForm|.
   m_PageMap.clear();
 
   // |m_pAnnotHandlerMgr| will try to access |m_pFormFiller| when it cleans
@@ -623,10 +623,10 @@
       m_pInfo, FPDFDocumentFromCPDFDocument(m_pCPDFDoc.Get()), nIndex));
 }
 
-CPDFSDK_InterForm* CPDFSDK_FormFillEnvironment::GetInterForm() {
-  if (!m_pInterForm)
-    m_pInterForm = pdfium::MakeUnique<CPDFSDK_InterForm>(this);
-  return m_pInterForm.get();
+CPDFSDK_InteractiveForm* CPDFSDK_FormFillEnvironment::GetInteractiveForm() {
+  if (!m_pInteractiveForm)
+    m_pInteractiveForm = pdfium::MakeUnique<CPDFSDK_InteractiveForm>(this);
+  return m_pInteractiveForm.get();
 }
 
 void CPDFSDK_FormFillEnvironment::UpdateAllViews(CPDFSDK_PageView* pSender,