Remove CPDF_Object::GetConstString and overrides

core/fpdfapi/fpdf_parser/cpdf_dictionary.cpp

Index: core/fpdfapi/fpdf_parser/cpdf_dictionary.cpp
diff --git a/core/fpdfapi/fpdf_parser/cpdf_dictionary.cpp b/core/fpdfapi/fpdf_parser/cpdf_dictionary.cpp
index 5f86a7bbc2a0152106b8d88a2b3337daad2d83fd..f03b14d8e1206ec3b34d2ae0d4f7d2af77ffa62b 100644
--- a/core/fpdfapi/fpdf_parser/cpdf_dictionary.cpp
+++ b/core/fpdfapi/fpdf_parser/cpdf_dictionary.cpp
@@ -68,12 +68,6 @@ CFX_ByteString CPDF_Dictionary::GetStringBy(const CFX_ByteStringC& key) const {
   return p ? p->GetString() : CFX_ByteString();
 }
 
-CFX_ByteStringC CPDF_Dictionary::GetConstStringBy(
-    const CFX_ByteStringC& key) const {
-  CPDF_Object* p = GetObjectBy(key);
-  return p ? p->GetConstString() : CFX_ByteStringC();
-}
-
 CFX_WideString CPDF_Dictionary::GetUnicodeTextBy(
     const CFX_ByteStringC& key) const {
   CPDF_Object* p = GetObjectBy(key);
@@ -88,13 +82,6 @@ CFX_ByteString CPDF_Dictionary::GetStringBy(const CFX_ByteStringC& key,
   return p ? p->GetString() : CFX_ByteString(def);
 }
 
-CFX_ByteStringC CPDF_Dictionary::GetConstStringBy(
-    const CFX_ByteStringC& key,
-    const CFX_ByteStringC& def) const {
-  CPDF_Object* p = GetObjectBy(key);
-  return p ? p->GetConstString() : CFX_ByteStringC(def);
-}
-
 int CPDF_Dictionary::GetIntegerBy(const CFX_ByteStringC& key) const {
   CPDF_Object* p = GetObjectBy(key);
   return p ? p->GetInteger() : 0;