Make CFX_ByteString(const CFX_ByteStringC&) explicit.

core/fpdfapi/fpdf_page/fpdf_page_parser_old.cpp

Index: core/fpdfapi/fpdf_page/fpdf_page_parser_old.cpp
diff --git a/core/fpdfapi/fpdf_page/fpdf_page_parser_old.cpp b/core/fpdfapi/fpdf_page/fpdf_page_parser_old.cpp
index 58ecb6c4d6a25b052c5055d0b14b363a55f6fe68..5bac23e137996bd659d1b2372e7983c67f1131a1 100644
--- a/core/fpdfapi/fpdf_page/fpdf_page_parser_old.cpp
+++ b/core/fpdfapi/fpdf_page/fpdf_page_parser_old.cpp
@@ -502,7 +502,7 @@ CFX_ByteString CPDF_StreamParser::ReadString() {
             if (buf.GetLength() > kMaxStringLength) {
               return CFX_ByteString(buf.GetBuffer(), kMaxStringLength);
             }
-            return buf.AsStringC();
+            return buf.MakeString();
           }
           parlevel--;
           buf.AppendChar(')');
@@ -581,7 +581,7 @@ CFX_ByteString CPDF_StreamParser::ReadString() {
   if (buf.GetLength() > kMaxStringLength) {
     return CFX_ByteString(buf.GetBuffer(), kMaxStringLength);
   }
-  return buf.AsStringC();
+  return buf.MakeString();
 }
 
 CFX_ByteString CPDF_StreamParser::ReadHexString() {
@@ -615,7 +615,7 @@ CFX_ByteString CPDF_StreamParser::ReadHexString() {
   if (buf.GetLength() > kMaxStringLength)
     return CFX_ByteString(buf.GetBuffer(), kMaxStringLength);
 
-  return buf.AsStringC();
+  return buf.MakeString();
 }
 
 bool CPDF_StreamParser::PositionIsInBounds() const {