Multiple fixes for permissions of site specific setting

- web refiner permission for site specific setting
- fix NPE when fetching origins
- fix clearing of storage data

Change-Id: I366b7292338ee417dda8b5fb6a9548dc9108ef5a
diff --git a/src/com/android/browser/BrowserSettings.java b/src/com/android/browser/BrowserSettings.java
index 60f13d5..9de584d 100644
--- a/src/com/android/browser/BrowserSettings.java
+++ b/src/com/android/browser/BrowserSettings.java
@@ -155,6 +155,9 @@
                         for (String origin : origins) {
                             PermissionsServiceFactory.PermissionsService.OriginInfo
                                     info = value.getOriginInfo(origin);
+                            if (info == null) {
+                                continue;
+                            }
                             int perm = info.getPermission(
                                     PermissionsServiceFactory.PermissionType.WEBREFINER);
                             if (perm == PermissionsServiceFactory.Permission.ALLOW) {