Make constructors recognize char[n] vs. char* and avoid strlen calls.

core/src/fpdfdoc/doc_metadata.cpp

Index: core/src/fpdfdoc/doc_metadata.cpp
diff --git a/core/src/fpdfdoc/doc_metadata.cpp b/core/src/fpdfdoc/doc_metadata.cpp
index e6c7a641e657b68f8a367ff8fa8d2508b658ec15..a09c688b38a79104e0fd18f6fd9425ccfc4feb79 100644
--- a/core/src/fpdfdoc/doc_metadata.cpp
+++ b/core/src/fpdfdoc/doc_metadata.cpp
@@ -70,7 +70,7 @@ void CPDF_Metadata::LoadDoc(CPDF_Document *pDoc)
     if (pXmlElmnt->GetTagName() == FX_BSTRC("RDF")) {
         pElmntRdf = pXmlElmnt;
     } else {
-        pElmntRdf = pXmlElmnt->GetElement(NULL, FX_BSTRC("RDF"));
+        pElmntRdf = pXmlElmnt->GetElement(CFX_ByteStringC(), FX_BSTRC("RDF"));
     }
 }
 FX_INT32 CPDF_Metadata::GetString(FX_BSTR bsItem, CFX_WideString &wsStr)
@@ -93,42 +93,42 @@ FX_INT32 CPDF_Metadata::GetString(FX_BSTR bsItem, CFX_WideString &wsStr)
     }
     int nChild = pElmntRdf->CountChildren();
     for (int i = 0; i < nChild; i++) {
-        CXML_Element *pTag = pElmntRdf->GetElement(NULL, FX_BSTRC("Description"), i);
+        CXML_Element *pTag = pElmntRdf->GetElement(CFX_ByteStringC(), "Description", i);
         if (!pTag) {
             continue;
         }
         if (bsItem == FX_BSTRC("Title") || bsItem == FX_BSTRC("Subject")) {
-            CXML_Element *pElmnt = pTag->GetElement(NULL, bsTag);
+            CXML_Element *pElmnt = pTag->GetElement(CFX_ByteString(), bsTag);
             if (!pElmnt) {
                 continue;
             }
-            pElmnt = pElmnt->GetElement(NULL, FX_BSTRC("Alt"));
+            pElmnt = pElmnt->GetElement(CFX_ByteString(), FX_BSTRC("Alt"));
             if (!pElmnt) {
                 continue;
             }
-            pElmnt = pElmnt->GetElement(NULL, FX_BSTRC("li"));
+            pElmnt = pElmnt->GetElement(CFX_ByteString(), FX_BSTRC("li"));
             if (!pElmnt) {
                 continue;
             }
             wsStr = pElmnt->GetContent(0);
             return wsStr.GetLength();
         } else if (bsItem == FX_BSTRC("Author")) {
-            CXML_Element *pElmnt = pTag->GetElement(NULL, bsTag);
+            CXML_Element *pElmnt = pTag->GetElement(CFX_ByteString(), bsTag);
             if (!pElmnt) {
                 continue;
             }
-            pElmnt = pElmnt->GetElement(NULL, FX_BSTRC("Seq"));
+            pElmnt = pElmnt->GetElement(CFX_ByteString(), FX_BSTRC("Seq"));
             if (!pElmnt) {
                 continue;
             }
-            pElmnt = pElmnt->GetElement(NULL, FX_BSTRC("li"));
+            pElmnt = pElmnt->GetElement(CFX_ByteString(), FX_BSTRC("li"));
             if (!pElmnt) {
                 continue;
             }
             wsStr = pElmnt->GetContent(0);
             return wsStr.GetLength();
         } else {
-            CXML_Element *pElmnt = pTag->GetElement(NULL, bsTag);
+            CXML_Element *pElmnt = pTag->GetElement(CFX_ByteString(), bsTag);
             if (!pElmnt) {
                 continue;
             }