Creates GCP promo for ChromeOS users with no cloud printers.

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 bucket groups. Each group describes a set of events
    * that can happen in order. This implies that an event cannot occur twice and
    * an event that occurs semantically before another event, should not occur
    * after.
    * @enum {number}
    */
   Metrics.BucketGroup = {
-    DESTINATION_SEARCH: 0
+    DESTINATION_SEARCH: 0,
+    GCP_PROMO: 1
   };
 
   /**
    * Enumeration of buckets that a user can enter while using the destination
    * search widget.
    * @enum {number}
    */
   Metrics.DestinationSearchBucket = {
     // Used when the print destination search widget is shown.
     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.
     CANCELED: 2,
     // Used when the Google Cloud Print promotion (shown in the destination
     // search widget) is shown to the user.
     CLOUDPRINT_PROMO_SHOWN: 3,
     // Used when the user chooses to sign-in to their Google account.
     SIGNIN_TRIGGERED: 4
   };
 
   /**
+   * Enumeration of buckets that a user can enter while using the Google Cloud
+   * Print promotion.
+   * @enum {number}
+   */
+  Metrics.GcpPromoBucket = {
+    // Used when the Google Cloud Print pomotion (shown above the pdf preview
+    // plugin) is shown to the user.
+    SHOWN: 0,
+    // Used when the user clicks the "Get started" link in the promotion shown
+    // in CLOUDPRINT_BIG_PROMO_SHOWN.
+    CLICKED: 1,
+    // Used when the user dismisses the promotion shown in
+    // CLOUDPRINT_BIG_PROMO_SHOWN.
+    DISMISSED: 2
+  };
+
+  /**
    * Name of the C++ function to call to increment bucket counts.
    * @type {string}
    * @const
    * @private
    */
   Metrics.NATIVE_FUNCTION_NAME_ = 'reportUiEvent';
 
   Metrics.prototype = {
     /**
      * Increments the counter of a destination-search bucket.
      * @param {!Metrics.DestinationSearchBucket} bucket Bucket to increment.
      */
     incrementDestinationSearchBucket: function(bucket) {
       chrome.send(Metrics.NATIVE_FUNCTION_NAME_,
                   [Metrics.BucketGroup.DESTINATION_SEARCH, bucket]);
+    },
+
+    /**
+     * Increments the counter of a gcp-promo bucket.
+     * @param {!Metrics.GcpPromoBucket} bucket Bucket to increment.
+     */
+    incrementGcpPromoBucket: function(bucket) {
+      chrome.send(Metrics.NATIVE_FUNCTION_NAME_,
+                  [Metrics.BucketGroup.GCP_PROMO, bucket]);
     }
   };
 
   // Export
   return {
     Metrics: Metrics
   };
 });