[MD History] Copy stats from the old history page.

chrome/browser/resources/md_history/browser_service.js

 // Copyright 2016 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 Defines a singleton object, md_history.BrowserService, which
  * provides access to chrome.send APIs.
  */
 
 cr.define('md_history', function() {
@@ skipping 73 matching lines @@
      * @param {string} histogram
      * @param {number} value
      * @param {number} max
      */
     recordHistogram: function(histogram, value, max) {
       chrome.send('metricsHandler:recordInHistogram', [histogram, value, max]);
     },
 
     /**
     * Record an action in UMA.
-    * @param {string} actionDesc The name of the action to be logged.
+    * @param {string} action The name of the action to be logged.
     */
-    recordAction: function(actionDesc) {
-      chrome.send('metricsHandler:recordAction', [actionDesc]);
+    recordAction: function(action) {
+      if (action.indexOf('_') == -1)
+        action = 'HistoryPage_' + action;
+      chrome.send('metricsHandler:recordAction', [action]);
     },
 
     /**
      * @param {boolean} successful
      * @private
      */
     resolveDelete_: function(successful) {
       if (this.pendingDeleteItems_ == null ||
           this.pendingDeletePromise_ == null) {
         return;
@@ skipping 21 matching lines @@
   md_history.BrowserService.getInstance().resolveDelete_(true);
 }
 
 /**
  * Called by the history backend when the deletion failed.
  */
 function deleteFailed() {
   md_history.BrowserService.getInstance().resolveDelete_(false);
 }