Convert Unicode strings in the document info (#1458)

src/core.js

@@ -596,8 +596,15 @@ var PDFDocModel = (function PDFDocModelClosure() {
     },
     getDocumentInfo: function PDFDocModel_getDocumentInfo() {
       var info;
-      if (this.xref.trailer.has('Info'))
+      if (this.xref.trailer.has('Info')) {
-        info = this.xref.fetch(this.xref.trailer.get('Info'));
+        var infoDict = this.xref.fetch(this.xref.trailer.get('Info'));
+
+        info = {};
+        infoDict.forEach(function(key, value) {
+          info[key] = typeof value !== 'string' ? value :
+            stringToPDFString(value);
+        });
+      }
 
       return shadow(this, 'getDocumentInfo', info);
     },

web/viewer.js

@@ -571,8 +571,8 @@ var PDFView = {
         pdfTitle = metadata.get('dc:title');
     }
 
-    if (!pdfTitle && info && info.has('Title'))
+    if (!pdfTitle && info && info['Title'])
-      pdfTitle = info.get('Title');
+      pdfTitle = info['Title'];
 
     if (pdfTitle)
       document.title = pdfTitle;