Add type cast definitions for CPDF_String.

fpdfsdk/src/javascript/Document.cpp

Index: fpdfsdk/src/javascript/Document.cpp
diff --git a/fpdfsdk/src/javascript/Document.cpp b/fpdfsdk/src/javascript/Document.cpp
index 163323ad25a8e3a8bc1c4d81057eab2c905ef8b0..21f68c9b42b6e31ae4eb91047fb6ece8868adf71 100644
--- a/fpdfsdk/src/javascript/Document.cpp
+++ b/fpdfsdk/src/javascript/Document.cpp
@@ -848,14 +848,16 @@ FX_BOOL Document::info(IJS_Context* cc,
       CFX_ByteString bsKey;
       CPDF_Object* pValueObj = pDictionary->GetNextElement(pos, bsKey);
       CFX_WideString wsKey = CFX_WideString::FromUTF8(bsKey, bsKey.GetLength());
-      if ((pValueObj->GetType() == PDFOBJ_STRING) ||
-          (pValueObj->GetType() == PDFOBJ_NAME))
+      if (pValueObj->IsString() || (pValueObj->GetType() == PDFOBJ_NAME)) {
         FXJS_PutObjectString(isolate, pObj, wsKey.c_str(),
                              pValueObj->GetUnicodeText().c_str());
+      }
+
       if (pValueObj->IsNumber()) {
         FXJS_PutObjectNumber(isolate, pObj, wsKey.c_str(),
                              (float)pValueObj->GetNumber());
       }
+
       if (pValueObj->IsBoolean()) {
         FXJS_PutObjectBoolean(isolate, pObj, wsKey.c_str(),
                               (bool)pValueObj->GetInteger());