ntp4: app install improvements

chrome/browser/resources/ntp4/nav_dot.js

Index: chrome/browser/resources/ntp4/nav_dot.js
diff --git a/chrome/browser/resources/ntp4/nav_dot.js b/chrome/browser/resources/ntp4/nav_dot.js
index b3bd1e8c8e25dcc8d4630952226b9fe74933a638..81ed3fe8cb3bfcc598f33cf6ddc29c5b5083754c 100644
--- a/chrome/browser/resources/ntp4/nav_dot.js
+++ b/chrome/browser/resources/ntp4/nav_dot.js
@@ -72,6 +72,14 @@ cr.define('ntp4', function() {
     },
 
     /**
+     * Gets the associated TilePage.
+     * @return {TilePage}
+     */
+    get page() {
+      return this.page_;
+    },
+
+    /**
      * Removes the dot from the page after transitioning to 0 width.
      */
     animateRemove: function() {
@@ -184,10 +192,8 @@ cr.define('ntp4', function() {
 
       if (!this.dragWrapper_.isCurrentDragTarget)
         e.dataTransfer.dropEffect = 'none';
-      else if (ntp4.getCurrentlyDraggingTile())
-        e.dataTransfer.dropEffect = 'move';
       else
-        e.dataTransfer.dropEffect = 'copy';
+        this.page_.setDropEffect(e.dataTransfer);
     },
 
     /**