Remove implicit conversions and some cleanup

core/src/fpdfdoc/doc_form.cpp

Index: core/src/fpdfdoc/doc_form.cpp
diff --git a/core/src/fpdfdoc/doc_form.cpp b/core/src/fpdfdoc/doc_form.cpp
index 5e333ea02574332edc71e72332a7e8f9aa3dc6d9..684d9122ad91969b52346dc84da1ef9370fdfba4 100644
--- a/core/src/fpdfdoc/doc_form.cpp
+++ b/core/src/fpdfdoc/doc_form.cpp
@@ -836,14 +836,13 @@ void CPDF_InterForm::RemoveFormFont(CFX_ByteString csNameTag) {
   m_bUpdated = TRUE;
   RemoveInterFormFont(m_pFormDict, csNameTag);
 }
+
 CPDF_DefaultAppearance CPDF_InterForm::GetDefaultAppearance() {
-  CFX_ByteString csDA;
-  if (!m_pFormDict) {
-    return csDA;
-  }
-  csDA = m_pFormDict->GetStringBy("DA");
-  return csDA;
+  if (!m_pFormDict)
+    return CPDF_DefaultAppearance();
+  return CPDF_DefaultAppearance(m_pFormDict->GetStringBy("DA"));
 }
+
 CPDF_Font* CPDF_InterForm::GetDefaultFormFont() {
   return GetDefaultInterFormFont(m_pFormDict, m_pDocument);
 }