Adds the MostVisitedAction stat. This stat will provide a baseline to compare

chrome/browser/resources/ntp4/suggestions_page.js

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 cr.define('ntp', function() {
   'use strict';
 
   var TilePage = ntp.TilePage;
 
   /**
-   * See description for these values in suggestions_page_handler.h.
-   * @enum {number}
-   */
-  var SuggestedSitesAction = {
-    CLICKED_SUGGESTED_TILE: 11,
-    CLICKED_OTHER_NTP_PANE: 12,
-    OTHER: 13
-  };
-
-  /**
    * A counter for generating unique tile IDs.
    */
   var tileID = 0;
 
   /**
    * Creates a new Suggestions page object for tiling.
    * @constructor
    * @extends {HTMLAnchorElement}
    */
   function Suggestion() {
@@ skipping 107 matching lines @@
      */
     handleClick_: function(e) {
       if (e.target.classList.contains('close-button')) {
         this.blacklist_();
         e.preventDefault();
       } else {
         // Records the index of this tile.
         chrome.send('metricsHandler:recordInHistogram',
                     ['NewTabPage.SuggestedSite', this.index, 8]);
         chrome.send('suggestedSitesAction',
-                    [SuggestedSitesAction.CLICKED_SUGGESTED_TILE]);
+                    [ntp.NtpFollowAction.CLICKED_TILE]);
       }
     },
 
     /**
      * Allow blacklisting suggestions site using the keyboard.
      * @param {Event} e The keydown event.
      */
     handleKeyDown_: function(e) {
       if (!cr.isMac && e.keyCode == 46 || // Del
           cr.isMac && e.metaKey && e.keyCode == 8) { // Cmd + Backspace
@@ skipping 168 matching lines @@
           tile.updateForData(page);
       }
     },
 
     /**
      * Handles the 'card deselected' event (i.e. the user clicked to another
      * pane).
      * @param {Event} e The CardChanged event.
      */
     handleCardDeselected_: function(e) {
-      chrome.send('suggestedSitesAction',
-                  [SuggestedSitesAction.CLICKED_OTHER_NTP_PANE]);
+      if (!document.documentElement.classList.contains('starting-up')) {
+        chrome.send('suggestedSitesAction',
+                    [ntp.NtpFollowAction.CLICKED_OTHER_NTP_PANE]);
+      }
     },
 
     /**
      * Handles the 'card selected' event (i.e. the user clicked to select the
      * Suggested pane).
      * @param {Event} e The CardChanged event.
      */
     handleCardSelected_: function(e) {
-      chrome.send('suggestedSitesSelected');
+      if (!document.documentElement.classList.contains('starting-up'))
+        chrome.send('suggestedSitesSelected');
     },
 
     /**
      * Array of suggestions data objects.
      * @type {Array}
      */
     get data() {
       return this.data_;
     },
     set data(data) {
@@ skipping 14 matching lines @@
     /** @inheritDoc */
     shouldAcceptDrag: function(e) {
       return false;
     },
 
     /** @inheritDoc */
     heightForWidth: heightForWidth,
   };
 
   /**
+   * Executed once the NTP has loaded. Checks if the Suggested pane is
+   * shown or not. If it is shown, the 'suggestedSitesSelected' message is sent
+   * to the C++ code, to record the fact that the user has seen this pane.
+   */
+  SuggestionsPage.onLoaded = function() {
+    if (ntp.getCardSlider() &&
+        ntp.getCardSlider().currentCardValue &&
+        ntp.getCardSlider().currentCardValue.classList
+        .contains('suggestions-page')) {
+      chrome.send('suggestedSitesSelected');
+    }
+  }
+
+  /**
    * We've gotten additional data for Suggestions page. Update our old data with
    * the new data. The ordering of the new data is not important, except when a
    * page is pinned. Thus we try to minimize re-ordering.
    * @param {Array} oldData The current Suggestions page list.
    * @param {Array} newData The new Suggestions page list.
    * @return {Array} The merged page list that should replace the current page
    * list.
    */
   function refreshData(oldData, newData) {
     oldData = oldData.slice(0, THUMBNAIL_COUNT);
@@ skipping 56 matching lines @@
     }
 
     return oldData;
   }
 
   return {
     SuggestionsPage: SuggestionsPage,
     refreshData: refreshData,
   };
 });
+
+document.addEventListener('ntpLoaded', ntp.SuggestionsPage.onLoaded);