3 files changed, 11 insertions, 7 deletions
diff --git a/xfa/fxfa/app/xfa_ffchoicelist.cpp b/xfa/fxfa/app/xfa_ffchoicelist.cpp
index 72284d6ef7..d19fd6876b 100644
--- a/xfa/fxfa/app/xfa_ffchoicelist.cpp
+++ b/xfa/fxfa/app/xfa_ffchoicelist.cpp
@@ -6,7 +6,10 @@
 
 #include "xfa/fxfa/app/xfa_ffchoicelist.h"
 
+#include <vector>
+
 #include "third_party/base/ptr_util.h"
+#include "third_party/base/stl_util.h"
 #include "xfa/fwl/cfwl_app.h"
 #include "xfa/fwl/cfwl_combobox.h"
 #include "xfa/fwl/cfwl_edit.h"
@@ -50,9 +53,9 @@ bool CXFA_FFListBox::LoadWidget() {
   m_pNormalWidget->SetDelegate(this);
   m_pNormalWidget->LockUpdate();
 
-  CFX_WideStringArray wsLabelArray;
+  std::vector<CFX_WideString> wsLabelArray;
   m_pDataAcc->GetChoiceListItems(wsLabelArray, false);
-  int32_t iItems = wsLabelArray.GetSize();
+  int32_t iItems = pdfium::CollectionSize<int32_t>(wsLabelArray);
   for (int32_t i = 0; i < iItems; i++) {
     pListBox->AddString(wsLabelArray[i].AsStringC());
   }
@@ -247,9 +250,9 @@ bool CXFA_FFComboBox::LoadWidget() {
   m_pNormalWidget->SetDelegate(this);
   m_pNormalWidget->LockUpdate();
 
-  CFX_WideStringArray wsLabelArray;
+  std::vector<CFX_WideString> wsLabelArray;
   m_pDataAcc->GetChoiceListItems(wsLabelArray, false);
-  int32_t iItems = wsLabelArray.GetSize();
+  int32_t iItems = pdfium::CollectionSize<int32_t>(wsLabelArray);
   for (int32_t i = 0; i < iItems; i++) {
     pComboBox->AddString(wsLabelArray[i].AsStringC());
   }
diff --git a/xfa/fxfa/app/xfa_ffdocview.cpp b/xfa/fxfa/app/xfa_ffdocview.cpp
index 477bd54457..78b690afc1 100644
--- a/xfa/fxfa/app/xfa_ffdocview.cpp
+++ b/xfa/fxfa/app/xfa_ffdocview.cpp
@@ -7,6 +7,7 @@
 #include "xfa/fxfa/xfa_ffdocview.h"
 
 #include "core/fxcrt/fx_ext.h"
+#include "third_party/base/stl_util.h"
 #include "xfa/fxfa/app/xfa_ffbarcode.h"
 #include "xfa/fxfa/app/xfa_ffcheckbutton.h"
 #include "xfa/fxfa/app/xfa_ffchoicelist.h"
@@ -146,7 +147,7 @@ int32_t CXFA_FFDocView::GetLayoutStatus() {
   return m_iStatus;
 }
 void CXFA_FFDocView::ShowNullTestMsg() {
-  int32_t iCount = m_arrNullTestMsg.GetSize();
+  int32_t iCount = pdfium::CollectionSize<int32_t>(m_arrNullTestMsg);
   CXFA_FFApp* pApp = m_pDoc->GetApp();
   IXFA_AppProvider* pAppProvider = pApp->GetAppProvider();
   if (pAppProvider && iCount) {
@@ -169,7 +170,7 @@ void CXFA_FFDocView::ShowNullTestMsg() {
     pAppProvider->LoadString(XFA_IDS_AppName, wsTitle);
     pAppProvider->MsgBox(wsMsg, wsTitle, XFA_MBICON_Status, XFA_MB_OK);
   }
-  m_arrNullTestMsg.RemoveAll();
+  m_arrNullTestMsg.clear();
 }
 void CXFA_FFDocView::UpdateDocView() {
   if (IsUpdateLocked()) {
diff --git a/xfa/fxfa/app/xfa_ffwidgetacc.cpp b/xfa/fxfa/app/xfa_ffwidgetacc.cpp
index 64d76a6d2a..d63a4f5151 100644
--- a/xfa/fxfa/app/xfa_ffwidgetacc.cpp
+++ b/xfa/fxfa/app/xfa_ffwidgetacc.cpp
@@ -476,7 +476,7 @@ int32_t CXFA_WidgetAcc::ProcessNullTestValidate(CXFA_Validate validate,
     }
     if (!wsNullMsg.IsEmpty()) {
       if (eNullTest != XFA_ATTRIBUTEENUM_Disabled) {
-        m_pDocView->m_arrNullTestMsg.Add(wsNullMsg);
+        m_pDocView->m_arrNullTestMsg.push_back(wsNullMsg);
         return XFA_EVENTERROR_Error;
       }
       return XFA_EVENTERROR_Success;