Avoid narrowing of strings in FWL SetEditText methods.

xfa/fxfa/app/xfa_ffchoicelist.cpp

Index: xfa/fxfa/app/xfa_ffchoicelist.cpp
diff --git a/xfa/fxfa/app/xfa_ffchoicelist.cpp b/xfa/fxfa/app/xfa_ffchoicelist.cpp
index fe7943cfb1be27b28d268844b575126516811bab..a13c36d973dd783b832c30bbb52236d1c35f261c 100644
--- a/xfa/fxfa/app/xfa_ffchoicelist.cpp
+++ b/xfa/fxfa/app/xfa_ffchoicelist.cpp
@@ -250,7 +250,7 @@ FX_BOOL CXFA_FFComboBox::LoadWidget() {
   } else {
     CFX_WideString wsText;
     m_pDataAcc->GetValue(wsText, XFA_VALUEPICTURE_Raw);
-    pComboBox->SetEditText(wsText.AsStringC());
+    pComboBox->SetEditText(wsText);
   }
   UpdateWidgetProperty();
   m_pNormalWidget->UnlockUpdate();
@@ -382,7 +382,7 @@ FX_BOOL CXFA_FFComboBox::UpdateFWLData() {
     CFX_WideString wsText;
     ((CFWL_ComboBox*)m_pNormalWidget)->SetCurSel(-1);
     m_pDataAcc->GetValue(wsText, XFA_VALUEPICTURE_Raw);
-    ((CFWL_ComboBox*)m_pNormalWidget)->SetEditText(wsText.AsStringC());
+    ((CFWL_ComboBox*)m_pNormalWidget)->SetEditText(wsText);
   }
   m_pNormalWidget->Update();
   return TRUE;