Site Settings: Give each category its own route.

chrome/browser/resources/settings/site_settings/site_settings_category.js

Index: chrome/browser/resources/settings/site_settings/site_settings_category.js
diff --git a/chrome/browser/resources/settings/site_settings/site_settings_category.js b/chrome/browser/resources/settings/site_settings/site_settings_category.js
index 01b764c709e7768fc15c66762547c27bbac9b9b4..22a334737b40f23e7df97f4b7ac0769e251e599c 100644
--- a/chrome/browser/resources/settings/site_settings/site_settings_category.js
+++ b/chrome/browser/resources/settings/site_settings/site_settings_category.js
@@ -35,9 +35,7 @@ Polymer({
      * example, the Location category can be set to Block/Ask so false, in that
      * case, represents Block and true represents Ask.
      */
-    categoryEnabled: {
-      type: Boolean,
-    },
+    categoryEnabled: Boolean,
 
     /**
      * The origin that was selected by the user in the dropdown list.
@@ -62,9 +60,6 @@ Polymer({
   ],
 
   ready: function() {
-    // TODO(finnur): Handle dynamic routes, so that we can link directly into
-    // individual categories without having to first stop by the site settings
-    // page to select a category.
     this.$.blockList.categorySubtype = settings.PermissionValues.BLOCK;
     this.$.allowList.categorySubtype = settings.PermissionValues.ALLOW;
   },
@@ -84,7 +79,7 @@ Polymer({
                               settings.PermissionValues.ALLOW :
                               settings.PermissionValues.BLOCK);
         break;
-      case settings.ContentSettingsTypes.NOTIFICATION:
+      case settings.ContentSettingsTypes.NOTIFICATIONS:
       case settings.ContentSettingsTypes.GEOLOCATION:
       case settings.ContentSettingsTypes.CAMERA:
       case settings.ContentSettingsTypes.MIC: