Implement deletion of storage per site.

chrome/browser/resources/settings/site_settings_page/site_settings_page.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.
 
 /**
  * @fileoverview
  * 'settings-site-settings-page' is the settings page containing privacy and
  * security site settings.
  *
  * Example:
@@ skipping 21 matching lines @@
       notify: true,
     },
 
     /**
      * The current active route.
      */
     currentRoute: {
       type: Object,
       notify: true,
     },
+
+    /**
+     * The category selected by the user.
+     */
+    categorySelected: {
+      type: String,
+      notify: true,
+    },
   },
 
   ready: function() {
     CrSettingsPrefs.initialized.then(function() {
       // TODO(finnur): Implement 'All Sites' list.
       this.addCategory(settings.ContentSettingsTypes.COOKIES);
       this.addCategory(settings.ContentSettingsTypes.GEOLOCATION);
       this.addCategory(settings.ContentSettingsTypes.CAMERA);
       this.addCategory(settings.ContentSettingsTypes.MIC);
       this.addCategory(settings.ContentSettingsTypes.JAVASCRIPT);
@@ skipping 33 matching lines @@
     paperIcon.appendChild(setting);
     root.appendChild(paperIcon);
   },
 
   /**
    * Handles selection of a single category and navigates to the details for
    * that category.
    */
   onTapCategory: function(event) {
     var description = event.currentTarget.querySelector('.flex').innerText;
-    var page = this.computeCategoryTextId(
+    this.categorySelected = this.computeCategoryTextId(
         this.computeCategoryFromDesc(description));
     this.currentRoute = {
       page: this.currentRoute.page,
       section: 'privacy',
-      subpage: ['site-settings', 'site-settings-category-' + page],
+      subpage: ['site-settings', 'site-settings-category-' +
+          this.categorySelected],
     };
   },
 });