MD History: Use iron-scroll-threshold to determine when to load new data

chrome/browser/resources/md_history/history_list.html

Index: chrome/browser/resources/md_history/history_list.html
diff --git a/chrome/browser/resources/md_history/history_list.html b/chrome/browser/resources/md_history/history_list.html
index 9642694196cff465ea60c9b9dc8627cf5112f5f1..b7c28687a16b27e4f7b8686118a3a03c72903474 100644
--- a/chrome/browser/resources/md_history/history_list.html
+++ b/chrome/browser/resources/md_history/history_list.html
@@ -1,5 +1,6 @@
 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-list/iron-list.html">
+<link rel="import" href="chrome://resources/polymer/v1_0/iron-scroll-threshold/iron-scroll-threshold.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-item/paper-item.html">
 <link rel="import" href="chrome://resources/cr_elements/cr_shared_menu/cr_shared_menu.html">
 <link rel="import" href="chrome://history/constants.html">
@@ -35,7 +36,6 @@
       {{noResultsMessage_(searchTerm, loading_)}}
     </div>
     <iron-list items="{{historyData}}" as="item" id="infinite-list"
-        on-scroll="scrollHandler_"
         hidden$="{{!hasResults(historyData.length)}}">
       <template>
         <history-item item="[[item]]"
@@ -49,6 +49,9 @@
         </history-item>
       </template>
     </iron-list>
+    <iron-scroll-threshold id="scroll-threshold" scroll-target="infinite-list"
+        lower-threshold="500" on-lower-threshold="loadMoreData_">
+    </iron-scroll-threshold>
     <cr-shared-menu id="sharedMenu">
       <paper-item id="menuMoreButton" on-tap="onMoreFromSiteTap_">
         $i18n{moreFromSite}