Update chrome.metricsPrivate externs and make closure fixes

components/chrome_apps/webstore_widget/app/main.js

 // Copyright 2015 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.
 
 //<include src="../../../../ui/webui/resources/js/cr.js">
 //<include src="../../../../ui/webui/resources/js/load_time_data.js">
 //<include src="../../../../ui/webui/resources/js/i18n_template_no_process.js">
 //<include src="../../../../ui/webui/resources/js/cr/event_target.js">
 //<include src="../../../../ui/webui/resources/js/cr/ui/dialogs.js">
 
@@ skipping 64 matching lines @@
 
       /**
        * @param {string} enumName
        * @param {number} value
        * @param {number} enumSize
        */
       recordEnum: function(enumName, value, enumSize) {
         var index = (value >= 0 && value < enumSize) ? value : enumSize;
         chrome.metricsPrivate.recordValue({
           'metricName': 'WebstoreWidgetApp.' + enumName,
-          'type': 'histogram-linear',
+          'type': chrome.metricsPrivate.MetricTypeType.HISTOGRAM_LINEAR,
           'min': 1,
           'max': enumSize,
           'buckets': enumSize + 1
         }, index);
       },
 
       /** @param {string} actionName */
       recordUserAction: function(actionName) {
         chrome.metricsPrivate.recordUserAction(
             'WebstoreWidgetApp.' + actionName);
@@ skipping 139 matching lines @@
           var result = widgetContainer.finalizeAndGetResult();
           showWidgetResult(result.result);
         })
         /** @param {*} error */
         .catch(function(error) {
           showWidgetResult(CWSWidgetContainer.Result.FAILED);
         });
   });
 });
 })();