Kill NewTabPage.NumberOfMouseOvers.

chrome/browser/resources/local_ntp/most_visited_util.js

 // Copyright 2013 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.
 
 
 /**
  * @fileoverview Utilities for rendering most visited thumbnails and titles.
  */
 
 <include src="instant_iframe_validation.js">
@@ skipping 22 matching lines @@
   NTP_GRAY_TILE: 4,
   // The visuals of that tile are handled externally by the page itself.
   NTP_EXTERNAL_TILE: 5,
   // There was an error in loading both the thumbnail image and the fallback
   // (if it was provided), resulting in a grey tile.
   NTP_THUMBNAIL_ERROR: 6,
   // Used a gray tile with the domain as the fallback for a failed thumbnail.
   NTP_GRAY_TILE_FALLBACK: 7,
   // The visuals of that tile's fallback are handled externally.
   NTP_EXTERNAL_TILE_FALLBACK: 8,
-  // The user moused over an NTP tile or title.
-  NTP_MOUSEOVER: 9,
   // A NTP Tile has finished loading (successfully or failing).
   NTP_TILE_LOADED: 10,
 };
 
 /**
  * Type of the impression provider for a generic client-provided suggestion.
  * @type {string}
  * @const
  */
 var CLIENT_PROVIDER_NAME = 'client';
@@ skipping 74 matching lines @@
   link.target = '_top';
   // Include links in the tab order.  The tabIndex is necessary for
   // accessibility.
   link.tabIndex = '0';
   if (text) {
     // Wrap text with span so ellipsis will appear at the end of multiline.
     var spanWrap = document.createElement('span');
     spanWrap.textContent = text;
     link.appendChild(spanWrap);
   }
-  link.addEventListener('mouseover', function() {
-    var ntpApiHandle = chrome.embeddedSearch.newTabPage;
-    ntpApiHandle.logEvent(NTP_LOGGING_EVENT_TYPE.NTP_MOUSEOVER);
-  });
   link.addEventListener('focus', function() {
     window.parent.postMessage('linkFocused', DOMAIN_ORIGIN);
   });
   link.addEventListener('blur', function() {
     window.parent.postMessage('linkBlurred', DOMAIN_ORIGIN);
   });
 
   var navigateFunction = function handleNavigation(e) {
     var isServerSuggestion = 'url' in params;
 
@@ skipping 156 matching lines @@
   if (navigator.sendBeacon) {
     navigator.sendBeacon(url);
   } else {
     // if sendBeacon is not enabled, we fallback for "a ping".
     var a = document.createElement('a');
     a.href = '#';
     a.ping = url;
     a.click();
   }
 }