1 files changed, 24 insertions, 13 deletions

diff --git a/core/fpdfapi/parser/cpdf_dictionary.cpp b/core/fpdfapi/parser/cpdf_dictionary.cpp
index 5257a20586..ae7239efdf 100644
--- a/core/fpdfapi/parser/cpdf_dictionary.cpp
+++ b/core/fpdfapi/parser/cpdf_dictionary.cpp
@@ -81,63 +81,74 @@ std::unique_ptr<CPDF_Object> CPDF_Dictionary::CloneNonCyclic(
   return std::move(pCopy);
 }
 
-CPDF_Object* CPDF_Dictionary::GetObjectFor(const ByteString& key) const {
+const CPDF_Object* CPDF_Dictionary::GetObjectFor(const ByteString& key) const {
   auto it = m_Map.find(key);
   return it != m_Map.end() ? it->second.get() : nullptr;
 }
 
-CPDF_Object* CPDF_Dictionary::GetDirectObjectFor(const ByteString& key) const {
+CPDF_Object* CPDF_Dictionary::GetObjectFor(const ByteString& key) {
+  auto it = m_Map.find(key);
+  return it != m_Map.end() ? it->second.get() : nullptr;
+}
+
+const CPDF_Object* CPDF_Dictionary::GetDirectObjectFor(
+    const ByteString& key) const {
+  const CPDF_Object* p = GetObjectFor(key);
+  return p ? p->GetDirect() : nullptr;
+}
+
+CPDF_Object* CPDF_Dictionary::GetDirectObjectFor(const ByteString& key) {
   CPDF_Object* p = GetObjectFor(key);
   return p ? p->GetDirect() : nullptr;
 }
 
 ByteString CPDF_Dictionary::GetStringFor(const ByteString& key) const {
-  CPDF_Object* p = GetObjectFor(key);
+  const CPDF_Object* p = GetObjectFor(key);
   return p ? p->GetString() : ByteString();
 }
 
 WideString CPDF_Dictionary::GetUnicodeTextFor(const ByteString& key) const {
-  CPDF_Object* p = GetObjectFor(key);
-  if (CPDF_Reference* pRef = ToReference(p))
+  const CPDF_Object* p = GetObjectFor(key);
+  if (const CPDF_Reference* pRef = ToReference(p))
     p = pRef->GetDirect();
   return p ? p->GetUnicodeText() : WideString();
 }
 
 ByteString CPDF_Dictionary::GetStringFor(const ByteString& key,
                                          const ByteString& def) const {
-  CPDF_Object* p = GetObjectFor(key);
+  const CPDF_Object* p = GetObjectFor(key);
   return p ? p->GetString() : ByteString(def);
 }
 
 int CPDF_Dictionary::GetIntegerFor(const ByteString& key) const {
-  CPDF_Object* p = GetObjectFor(key);
+  const CPDF_Object* p = GetObjectFor(key);
   return p ? p->GetInteger() : 0;
 }
 
 int CPDF_Dictionary::GetIntegerFor(const ByteString& key, int def) const {
-  CPDF_Object* p = GetObjectFor(key);
+  const CPDF_Object* p = GetObjectFor(key);
   return p ? p->GetInteger() : def;
 }
 
 float CPDF_Dictionary::GetNumberFor(const ByteString& key) const {
-  CPDF_Object* p = GetObjectFor(key);
+  const CPDF_Object* p = GetObjectFor(key);
   return p ? p->GetNumber() : 0;
 }
 
 bool CPDF_Dictionary::GetBooleanFor(const ByteString& key,
                                     bool bDefault) const {
-  CPDF_Object* p = GetObjectFor(key);
+  const CPDF_Object* p = GetObjectFor(key);
   return ToBoolean(p) ? p->GetInteger() != 0 : bDefault;
 }
 
 const CPDF_Dictionary* CPDF_Dictionary::GetDictFor(
     const ByteString& key) const {
-  CPDF_Object* p = GetDirectObjectFor(key);
+  const CPDF_Object* p = GetDirectObjectFor(key);
   if (!p)
     return nullptr;
-  if (CPDF_Dictionary* pDict = p->AsDictionary())
+  if (const CPDF_Dictionary* pDict = p->AsDictionary())
     return pDict;
-  if (CPDF_Stream* pStream = p->AsStream())
+  if (const CPDF_Stream* pStream = p->AsStream())
     return pStream->GetDict();
   return nullptr;
 }