Destroy window before cleaning up combobox

fpdfsdk/formfiller/cffl_textfield.cpp

Index: fpdfsdk/formfiller/cffl_textfield.cpp
diff --git a/fpdfsdk/formfiller/cffl_textfield.cpp b/fpdfsdk/formfiller/cffl_textfield.cpp
index aaa096a26173d3c77df2689ec18865509c106c7e..1947940094967c2a50320138ee7fa8a802da4606 100644
--- a/fpdfsdk/formfiller/cffl_textfield.cpp
+++ b/fpdfsdk/formfiller/cffl_textfield.cpp
@@ -17,6 +17,11 @@ CFFL_TextField::CFFL_TextField(CPDFDoc_Environment* pApp, CPDFSDK_Annot* pAnnot)
 CFFL_TextField::~CFFL_TextField() {
   for (const auto& it : m_Maps)
     it.second->InvalidateFocusHandler(this);
+
+  // See comment in cffl_formfiller.h.
+  // The font map should be stored somewhere more appropriate so it will live
+  // until the PWL_Edit is done with it. pdfium:566
+  DestroyWindows();
 }
 
 PWL_CREATEPARAM CFFL_TextField::GetCreateParam() {