Support for distilling prior pages in an article.

third_party/readability/js/readability.js

Index: third_party/readability/js/readability.js
diff --git a/third_party/readability/js/readability.js b/third_party/readability/js/readability.js
index 9cdbb301392de0644724e0de7ba46d4d2cfd21d8..130ea29b04c2a95fdf2a9fe4781cbe4e3b2333a6 100644
--- a/third_party/readability/js/readability.js
+++ b/third_party/readability/js/readability.js
@@ -1744,10 +1744,12 @@ var readability = {
 // corresponds to a URL listed at index k in the array returned.
 (function () {
     readability.init();
-    var result = new Array(3);
+    var result = new Array(4);
     result[0] = readability.getArticleTitle();
     result[1] = readability.getDistilledArticleHTML();
     result[2] = readability.getNextPageLink();
+    // TODO(shashishekhar): Add actual previous page link here.
+    result[3] = '';
     return result.concat(readability.getImages());
 }())