Flesh out the location-page class to make it more general.

chrome/browser/resources/settings/site_settings/site_settings_behavior.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 Behavior common to Site Settings classes.
+ * NOTE: This behavior depends on PrefsBehavior so classes that need this
+ * behavior must first list the PrefsBehavior (ahead of this behavior).
+ */
+
+/** @polymerBehavior */
+var SiteSettingsBehavior = {

[Dan Beam, 2015/10/29 21:10:39]

if this is going to call getPref_, it should have:

  behaviors: [PrefsBehavior],

as a dependency

[Finnur, 2015/10/30 12:13:47]

I experimented with making behaviors inherit from behaviors and could neither
get it to work nor find any reference material on it on the web.

But Michael's suggestion of using:
var SiteSettingsBehavior = [PrefsBehavior, SiteSettingsBehaviorImpl];

... does seem to work. I have switched to that instead.

[Dan Beam, 2015/10/30 20:23:53]

cool with me

+  /**
+   * Returns whether the category default is set to enabled or not.
+   * @param {number} category The category to check.
+   * @return {boolean} True if the category default is set to enabled.
+   * @private
+   */
+  isCategoryAllowed_: function(category) {
+    var pref = this.getPref_(this.computeCategoryPrefName_(this.category));
+
+    // FullScreen is Allow vs. Ask.
+    if (category == settings.ContentSettingsTypes.FULLSCREEN)
+      return pref.value != settings.DefaultValues.ASK;
+
+    return pref.value != settings.DefaultValues.BLOCK;
+  },
+
+  /**
+   * A utility function to compute the icon to use for the category.
+   * @param {number} category The category to show the icon for.
+   * @return {string} The id of the icon for the given category.
+   * @private
+   */
+  computeIconForContentCategory_: function(category) {
+    switch (category) {
+      case settings.ContentSettingsTypes.COOKIES:
+        return '';  // Haven't found a good cookies icon under iron-icons.
+      case settings.ContentSettingsTypes.JAVASCRIPT:
+        return 'icons:input';
+      case settings.ContentSettingsTypes.FULLSCREEN:
+        return 'icons:fullscreen';
+      case settings.ContentSettingsTypes.POPUPS:
+        return 'icons:open-in-new';
+      case settings.ContentSettingsTypes.GEOLOCATION:
+        return 'communication:location-on';
+      case settings.ContentSettingsTypes.NOTIFICATION:
+        return 'social:notifications';
+      case settings.ContentSettingsTypes.CAMERA:
+        return 'av:videocam';
+      case settings.ContentSettingsTypes.MIC:
+        return 'av:mic';
+      default:
+        assertNotReached();
+        return '';
+    }
+  },
+
+  /**
+   * A utility function to compute the title of the category.
+   * @param {number} category The category to show the title for.
+   * @return {string} The title for the given category.
+   * @private
+   */
+  computeTitleForContentCategory_: function(category) {
+    switch (category) {
+      case settings.ContentSettingsTypes.COOKIES:
+        return loadTimeData.getString('siteSettingsCookies');
+      case settings.ContentSettingsTypes.JAVASCRIPT:
+        return loadTimeData.getString('siteSettingsJavascript');
+      case settings.ContentSettingsTypes.FULLSCREEN:
+        return loadTimeData.getString('siteSettingsFullscreen');
+      case settings.ContentSettingsTypes.POPUPS:
+        return loadTimeData.getString('siteSettingsPopups');
+      case settings.ContentSettingsTypes.GEOLOCATION:
+        return loadTimeData.getString('siteSettingsLocation');
+      case settings.ContentSettingsTypes.NOTIFICATION:
+        return loadTimeData.getString('siteSettingsNotifications');
+      case settings.ContentSettingsTypes.CAMERA:
+        return loadTimeData.getString('siteSettingsCamera');
+      case settings.ContentSettingsTypes.MIC:
+        return loadTimeData.getString('siteSettingsMic');
+      default:
+        assertNotReached();
+        return '';
+    }
+  },
+
+  /**
+   * A utility function to compute the name of the pref for the category.
+   * @param {number} category The category to find the pref name for.
+   * @return {string} The pref name for the given category.
+   * @private
+   */
+  computeCategoryPrefName_: function(category) {
+    return 'profile.default_content_setting_values.' +
+        this.computeCategorySuffix_(category);
+  },
+
+  /**
+   * A utility function to compute the name of the pref for the exceptions
+   * for a given category.
+   * @param {number} category The category to find the pref name for.
+   * @return {string} The pref name for the given category exceptions.
+   * @private
+   */
+  computeCategoryExceptionsPrefName_: function(category) {
+    return 'profile.content_settings.exceptions.' +
+        this.computeCategorySuffix_(category);
+  },
+
+  /**
+   * A utility function to convert the category enum into its text
+   * representation, for use with prefs.
+   * @param {number} category The category to find the pref name for.
+   * @return {string} The pref name (suffix) for the given category.
+   * @private
+   */
+  computeCategorySuffix_: function(category) {
+    switch (category) {
+      case settings.ContentSettingsTypes.COOKIES:
+        return 'cookies';
+      case settings.ContentSettingsTypes.JAVASCRIPT:
+        return 'javascript';
+      case settings.ContentSettingsTypes.FULLSCREEN:
+        return 'fullscreen';
+      case settings.ContentSettingsTypes.POPUPS:
+        return 'popups';
+      case settings.ContentSettingsTypes.GEOLOCATION:
+        return 'geolocation';
+      case settings.ContentSettingsTypes.NOTIFICATION:
+        return 'notifications';
+      case settings.ContentSettingsTypes.CAMERA:
+        return 'media_stream_camera';
+      case settings.ContentSettingsTypes.MIC:
+        return 'media_stream_mic';
+      default:
+        assertNotReached();
+        return '';
+    }
+  },
+
+  /**
+   * A utility function to compute the description for the category.
+   * @param {number} category The category to show the description for.
+   * @param {boolean} categoryEnabled The state of the global toggle.
+   * @return {string} The category description.
+   * @private
+   */
+  computeCategoryDesc_: function(category, categoryEnabled) {
+    switch (category) {
+      case settings.ContentSettingsTypes.JAVASCRIPT:
+        // "Allowed (recommended)" vs "Blocked".
+        return categoryEnabled ?
+            loadTimeData.getString('siteSettingsAllowedRecommended') :
+            loadTimeData.getString('siteSettingsBlocked');
+      case settings.ContentSettingsTypes.POPUPS:
+        // "Allowed" vs "Blocked (recommended)".
+        return categoryEnabled ?
+            loadTimeData.getString('siteSettingsAllowed') :
+            loadTimeData.getString('siteSettingsBlockedRecommended');
+      case settings.ContentSettingsTypes.NOTIFICATION:
+        // "Ask before sending (recommended)" vs "Blocked".
+        return categoryEnabled ?
+            loadTimeData.getString('siteSettingsAskBeforeSending') :
+            loadTimeData.getString('siteSettingsBlocked');
+      case settings.ContentSettingsTypes.GEOLOCATION:
+      case settings.ContentSettingsTypes.CAMERA:
+      case settings.ContentSettingsTypes.MIC:
+        // "Ask before accessing (recommended)" vs "Blocked".
+        return categoryEnabled ?
+            loadTimeData.getString('siteSettingsAskBeforeAccessing') :
+            loadTimeData.getString('siteSettingsBlocked');
+      case settings.ContentSettingsTypes.FULLSCREEN:
+        // "Allowed" vs. "Ask first (recommended)".
+        return categoryEnabled ?
+            loadTimeData.getString('siteSettingsAllowed') :
+            loadTimeData.getString('siteSettingsAskFirstRecommended');
+      case settings.ContentSettingsTypes.COOKIES:
+        // "Allow sites to save and read cookie data" vs "Blocked".
+        return categoryEnabled ?
+            loadTimeData.getString('siteSettingsCookiesAllowed') :
+            loadTimeData.getString('siteSettingsBlocked');
+      default:
+        assertNotReached();
+        return '';
+    }
+  },
+};