Address review comments by yury

src/core.js

@@ -561,14 +561,7 @@ var PDFDoc = (function pdfDoc() {
         switch (type) {
           case 'JpegStream':
             var imageData = data[2];
-
-            var src = 'data:image/jpeg;base64,' + window.btoa(imageData);
-            var img = new Image();
-            img.onload = (function jpegImageLoaderOnload() {
-              this.objs.resolve(id, img);
-            }).bind(this);
-            img.src = src;
-
+            loadJpegStream(id, imageData, this.objs);
             break;
           case 'Font':
             var name = data[2];

src/image.js

@@ -228,3 +228,11 @@ var PDFImage = (function pdfImage() {
   };
   return constructor;
 })();
+
+function loadJpegStream(id, imageData, objs) {
+  var img = new Image();
+  img.onload = (function jpegImageLoaderOnload() {
+    objs.resolve(id, img);
+  });
+  img.src = 'data:image/jpeg;base64,' + window.btoa(imageData);
+}

src/obj.js

@@ -589,7 +589,7 @@ var XRef = (function xRefXRef() {
           e = parser.getObj();
         }
         // Don't cache streams since they are mutable (except images).
-        if (!isStream(e) || e.src)
+        if (!isStream(e) || e instanceof JpegStream)
           this.cache[num] = e;
         return e;
       }