Implements metrics for destination search.

chrome/browser/resources/print_preview/metrics.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('print_preview', function() {
+  'use strict';
+
+  /**
+   * Object used to measure usage statistics.
+   * @constructor
+   */
+  function Metrics() {};
+
+  /**
+   * Enumeration of metrics buckets to record.
+   * @enum {number}
+   */
+  Metrics.Bucket = {
+    // Used when the print destination search widget is shown.
+    DESTINATION_SEARCH_SHOWN: 0,
+    // Used when the user selects a print destination.
+    DESTINATION_SELECTED: 1,
+    // Used when the print destination search widget is closed without selecting
+    // a print destination.
+    DESTINATION_SELECTION_CANCELED: 2,
+    // Used when the Google Cloud Print promotions is shown to the user.
+    CLOUDPRINT_PROMO_SHOWN: 3,
+    // Used when the user chooses to sign-in to their Google account.
+    SIGNIN_TRIGGERED: 4
+  };
+
+  Metrics.prototype = {
+    /**
+     * Increments the counter for a given bucket.
+     * @param {!print_preview.Metrics.Bucket} bucket Bucket to increment.
+     */
+    increment: function(bucket) {
+      chrome.send('reportDestinationEvent', bucket);
+    }
+  };
+
+  // Export
+  return {
+    Metrics: Metrics
+  };
+});