Revert "Revert "Add type cast definitions for CPDF_Dictionary.""

core/src/fpdfdoc/doc_formcontrol.cpp

Index: core/src/fpdfdoc/doc_formcontrol.cpp
diff --git a/core/src/fpdfdoc/doc_formcontrol.cpp b/core/src/fpdfdoc/doc_formcontrol.cpp
index 410f9a1f21aa6ff679e7843eddf47baba8ba13f0..c5f47d20cb486160ea81d5e165c7c21ec34276ec 100644
--- a/core/src/fpdfdoc/doc_formcontrol.cpp
+++ b/core/src/fpdfdoc/doc_formcontrol.cpp
@@ -61,10 +61,10 @@ void CPDF_FormControl::SetOnStateName(const CFX_ByteString& csOn) {
       continue;
     }
     CPDF_Object* pObjDirect1 = pObj1->GetDirect();
-    if (pObjDirect1->GetType() != PDFOBJ_DICTIONARY) {
+    CPDF_Dictionary* pSubDict = pObjDirect1->AsDictionary();
+    if (!pSubDict)
       continue;
-    }
-    CPDF_Dictionary* pSubDict = (CPDF_Dictionary*)pObjDirect1;
+
     FX_POSITION pos2 = pSubDict->GetStartPos();
     while (pos2) {
       CFX_ByteString csKey2;
@@ -287,8 +287,8 @@ CPDF_Font* CPDF_FormControl::GetDefaultControlFont() {
     return nullptr;
 
   CPDF_Object* pObj = FPDF_GetFieldAttr(m_pWidgetDict, "DR");
-  if (pObj && pObj->GetType() == PDFOBJ_DICTIONARY) {
-    CPDF_Dictionary* pFonts = ((CPDF_Dictionary*)pObj)->GetDict("Font");
+  if (CPDF_Dictionary* pDict = ToDictionary(pObj)) {
+    CPDF_Dictionary* pFonts = pDict->GetDict("Font");
     if (pFonts) {
       CPDF_Dictionary* pElement = pFonts->GetDict(csFontNameTag);
       if (pElement) {
@@ -304,8 +304,8 @@ CPDF_Font* CPDF_FormControl::GetDefaultControlFont() {
 
   CPDF_Dictionary* pPageDict = m_pWidgetDict->GetDict("P");
   pObj = FPDF_GetFieldAttr(pPageDict, "Resources");
-  if (pObj && pObj->GetType() == PDFOBJ_DICTIONARY) {
-    CPDF_Dictionary* pFonts = ((CPDF_Dictionary*)pObj)->GetDict("Font");
+  if (CPDF_Dictionary* pDict = ToDictionary(pObj)) {
+    CPDF_Dictionary* pFonts = pDict->GetDict("Font");
     if (pFonts) {
       CPDF_Dictionary* pElement = pFonts->GetDict(csFontNameTag);
       if (pElement) {