Add metrics for Webstore Gallery Widget app

ui/file_manager/file_manager/foreground/js/ui/suggest_apps_dialog.js

Index: ui/file_manager/file_manager/foreground/js/ui/suggest_apps_dialog.js
diff --git a/ui/file_manager/file_manager/foreground/js/ui/suggest_apps_dialog.js b/ui/file_manager/file_manager/foreground/js/ui/suggest_apps_dialog.js
index fa9252bfa84ff0d26bc9c882fe64441c8a0c340f..faedd4f1618673b848058b51477b8b147022a82c 100644
--- a/ui/file_manager/file_manager/foreground/js/ui/suggest_apps_dialog.js
+++ b/ui/file_manager/file_manager/foreground/js/ui/suggest_apps_dialog.js
@@ -137,7 +137,31 @@ SuggestAppsDialog.prototype.createWidgetPlatformDelegate_ = function() {
       INSTALLING_SPINNER_ALT: str('SUGGEST_DIALOG_INSTALLING_SPINNER_ALT')
     },
 
-    metricsImpl: metrics,
+    metricsImpl: {
+      /**
+       * @param {string} enumName
+       * @param {number} value
+       * @param {number} enumSize
+       */
+      recordEnum: function(enumName, value, enumSize) {
+        metrics.recordEnum('SuggestApps.' + enumName, value, enumSize);
+      },
+
+      /** @param {string} actionName */
+      recordUserAction: function(actionName) {
+        metrics.recordUserAction('SuggestApps.' + actionName);
+      },
+
+      /** @param {string} intervalName */
+      startInterval: function(intervalName) {
+        metrics.startInterval('SuggestApps.' + intervalName);
+      },
+
+      /** @param {string} intervalName */
+      recordInterval: function(intervalName) {
+        metrics.recordInterval('SuggestApps.' + intervalName);
+      }
+    },
 
     /**
      * @param {string} itemId,