ntp4: app install improvements

chrome/browser/resources/ntp4/apps_page.js

Index: chrome/browser/resources/ntp4/apps_page.js
diff --git a/chrome/browser/resources/ntp4/apps_page.js b/chrome/browser/resources/ntp4/apps_page.js
index 0b5a567745592924fa5df5331b6a9a23b91966f5..a81c34399f8767ee419b1e6af00010164b45ac51 100644
--- a/chrome/browser/resources/ntp4/apps_page.js
+++ b/chrome/browser/resources/ntp4/apps_page.js
@@ -420,7 +420,7 @@ cr.define('ntp4', function() {
       var tile = ntp4.getCurrentlyDraggingTile();
       if (!tile.querySelector('.app')) {
         e.preventDefault();
-        e.dataTransfer.dropEffect = 'copy';
+        this.setDropEffect(e.dataTransfer);
       } else {
         TilePage.prototype.doDragOver.call(this, e);
       }
@@ -517,6 +517,15 @@ cr.define('ntp4', function() {
 
       chrome.send('reorderApps', [draggedTile.firstChild.appId, appIds]);
     },
+
+    /** @inheritDoc */
+    setDropEffect: function(dataTransfer) {
+      var tile = ntp4.getCurrentlyDraggingTile();
+      if (tile && tile.querySelector('.app'))
+        dataTransfer.dropEffect = 'move';
+      else
+        dataTransfer.dropEffect = 'copy';
+    },
   };
 
   AppsPage.setPromo = function(data) {